To add to what RMS has stated, I'm on an older machine with not a lot of room left on the primary partition. I understand that's on me, but I wanted to add my notes about my local experience.

I compiled Emacs as a test with AOT turned on, and found that it started creating *.eln files. Lots of them. I recompile Emacs on a fairly regular basis, and after one compile/install of Emacs, I noted at least an extra 40Mb after about an hour's running with erc, org-mode and ef-themes (amongst others). On my older 2008-era machine that's starting to really show its age, the extra .eln files were not really worth it for me. I wish I had better news, I've been wanting a sped-up emacs for a little while now. To be fair, I _thought_ I saw a speed increase in what amounts to display code, but I'm not a programmer, mainly a user.

Is there a facility to purge out-of-date versions of the .eln files for a version that is installed later, and is that facility easy enough to look for via C-h f? This might make native compilation easier to swallow.

Regards, brickviking
(Emacs 29.1.90, GTK3, Linux-x86_64)