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Programming · by Hugo Martin · 2026-10-15

Legacy code rewrite: when is it the right call?

Everyone says never rewrite, yet some systems are truly unfixable. What signals told you it was time?

87 sparks · 18 comments

Comments

Daniel Kiptoo · 10 likes

Would love actual data on rewriting legacy code instead of vibes. Anyone have links? :)

Budi Santoso · 2 likes

Fair enough

Lina Keller · 6 likes

Not gonna lie, rewriting legacy code sounds simple until you try it with real constraints.

Ethan Brooks · 4 likes

Same experience here

Mariam Said · 5 likes

My manager read one article on rewriting legacy code and now it's our whole roadmap lol.

Faisal Al Saud · 1 likes

wait until you see the invoice

Ethan Brooks · 0 likes

lol my cat has stronger opinions on it than I do

Huy Le · 4 likes

Anyone else tired of the hype around rewriting legacy code? Feels like every other post is about it :)

Finn Brown · 1 likes

send help

Aoi Ito · 4 likes

We tried rewriting legacy code last quarter. Small stuff went well, but it got messy at scale.

Bianca Santos · 2 likes

wait until you see the invoice

Rohan Mehta · 0 likes

my wallet felt that

Curious River · 4 likes

I do this for a living, and the biggest costs of rewriting legacy code aren't the ones in the demo!

Bianca Santos · 11 likes

this. so much this

Solar River · 2 likes

Same experience here

Arif Hasan · 3 likes

I'm more of an enthusiast than a pro, but rewriting legacy code on weekends has been fun.

Rapid Baker · 8 likes

this. so much this

Amelia Hughes · 6 likes

Same experience here