Expectations what they are, any Apple silicon Mac is going to crush an old Intel Mac in snappiness, even running a supported Linux distro like MX23 or 25. If that is the lens that ones expectation passes through, running linux on old anything is not going to be acceptable. In that case, buy the newest Mac that can be responsibly afforded and enjoy it as countless folks do
I took a minute to capture some times of apple silicon, Intel and PowerPC hardware times for boot up and browser to MR that I currently have up on my network.
Boot up:
2023 16" MBP Sequoia - 27.04 seconds
2008 MBP MX23 - 41.64 seconds
2005 PowerMac G5 Leopard/Sorbet - 70.42 seconds
Browser to MR
2023 16" MBP Sequoia - Safari 18.6 - 8.95 seconds
2008 MBP MX23 - FireFox 146.0.1 - 13.06 seconds
2005 PowerMac G5 Leopard/Sorbet - Aqua Fox 3 - 10.00 seconds
So as what is pretty obvious I think to most people, apple silicon beat out the others, however current supported linux and even unsupported obsoleted old macOS on 20 year old PowerPC hardware is not this horrible unusable experience for the common daily driver tasks like YT, browsing, AI, email, discord etc. Are we going to process 8k raw video on an old Intel Mac ? Obviously not, but the usual stuff most of us do, absolutely we can and do it comfortably. Anyways, I highly recommend anyone who is curious about linux to give a distro like MX or Big a shot as their installation really is as painless as it gets on older Intel hardware and. It's pretty awesome.