>>712935736
I've seen decomp projects be stuck at the last 1-2% for months.
The Sonic Advance 2 decompilation hit 100% decompiled in January, but has been stuck at 92% matching code since. It's enough though that they've been able to build a proof of concept PC port with a bigger display area (240x160 -> 426x240)

Pic related, on the original game you wouldn't be able to see any of the terrain whilst holding onto that mid-air swing.