<!-- Should I Use It badge. Keep this link. -->
<a href="https://shouldiuse.io/vs/newsletter-3/lethain" target="_blank" style="display:inline-flex;flex-direction:column;align-items:flex-start;gap:8px;max-width:420px;box-sizing:border-box;padding:14px 16px;border:1px solid #d5dde4;border-radius:14px;background:#ffffff;color:#111111;font-family:Segoe UI,system-ui,sans-serif;line-height:1.25;text-decoration:none;box-shadow:0 8px 20px rgba(17,17,17,0.08);">
  <span style="display:flex;align-items:center;gap:10px;min-width:0;">
    <span style="display:inline-flex;align-items:center;flex:0 0 auto;border-radius:999px;padding:4px 10px;font-size:11px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;line-height:1.3;background:#eef8f0;color:#3b7d42;">Worth it</span>
    <span style="font-size:15px;font-weight:700;color:#111111;overflow-wrap:anywhere;">Software Design: Tidy First? | Kent Beck | Substack</span>
  </span>
  <span style="display:flex;align-items:center;gap:10px;min-width:0;">
    <span style="display:inline-flex;align-items:center;flex:0 0 auto;border-radius:999px;padding:4px 10px;font-size:11px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;line-height:1.3;background:#fef7e0;color:#7a5510;">Depends</span>
    <span style="font-size:15px;font-weight:700;color:#111111;overflow-wrap:anywhere;">Irrational Exuberance</span>
  </span>
  <span style="font-size:12px;font-weight:500;color:#516271;">Independent comparison on Should I Use It</span>
</a>

Text link

<a href="https://shouldiuse.io/vs/newsletter-3/lethain">Software Design: Tidy First? | Kent Beck | Substack vs Irrational Exuberance on Should I Use It</a>

Paste one snippet. Keep the link as it is. A nofollow tag stops search engines from following it.

Software Design: Tidy First? | Kent Beck | Substack versus Irrational Exuberance
Compare	Software Design: Tidy First? \| Kent Beck \| Substack	Irrational Exuberance
Verdict	Worth it	Depends
Best for	Working software engineers	Staff+ engineers
Who it's not for	Non-coders . it's essays for engineers, not a manager's process playbook	Anyone shopping for software
Privacy	No known public vulnerabilities found in the sources reviewed.^²	No known public vulnerabilities found in the sources reviewed.¹²
Public sentiment	Public reader reviews cover the companion book and are strongly positive on clarity and insight.^⁴	All review evidence found covers Robert Shiller's book of the same name, not; no user feedback on this site surfaced.¹¹
Biggest gotcha	Content extends the ~100-page book; sample free posts before paying yearly.^⁵	Name collides with Shiller's finance book; almost all search evidence is irrelevant to this site.¹¹

Pick Software Design: Tidy First? | Kent Beck | Substack when

Working software engineers
Readers who liked the Tidy First? book
Tech leads coaching design habits
TDD/XP practitioners

When Software Design: Tidy First? | Kent Beck | Substack is not a fit

Non-coders . it's essays for engineers, not a manager's process playbook
Devs who want the ideas once . buy the one-time book instead
Teams shopping for actual software . this is prose, not a tool
Anyone needing support, SLAs, or security reviews . none exist

Pick Irrational Exuberance when

Staff+ engineers
Engineering managers and CTOs
Readers wanting free leadership essays

When Irrational Exuberance is not a fit

Anyone shopping for software
Teams needing support, SLAs, or admins
Buyers wanting Shiller's finance book
Procurement or security reviews

Sources

Software Design: Tidy First? | Kent Beck | Substacknewsletter.kentbeck.com
official
Security pagenewsletter.kentbeck.com
security
Software I Pay For (pricing)drewlee.com
news
Tidy First? (book review)kalabro.tech
review
Tidy First? - Henrik Warne's bloghenrikwarne.com
review
Notes on Tidy First? | Irrational Exuberancelethain.com
review
Book Review: Tidy First?hamvocke.com
review
Tidy First? - Goodreadsgoodreads.com
review
My Take on Kent Beck's Tidy First?itnext.io
review
YesPress profile (subscriber count)yespress.io
news
Irrational Exuberance by Robert J. Shiller . Goodreadsgoodreads.com
review
Security pagelethain.com
security
Anyone read Irrational Exuberance? : r/REBubblereddit.com
review
Irrational Exuberance: A Book Revieweinvestingforbeginners.com
review
Irrational Exuberance, Third Edition . Princeton University Presspress.princeton.edu
official
Irrational exuberance . Wikipediaen.wikipedia.org
news