I thought the issue with this nowadays was that hardware support for suspend-to-ram has been increasingly removed from hardware.

At the same time, S3 sleep worked just fine on supported hardware 10 years ago. So what does suspend-to-ram have to do with Linux 6.11 in particular?

Pretty vague question, suspend to ram has always worked for me on multiple random laptops

Yes, very happy Thinkpad P14s user here on EndeavourOS.

Always worked for me on Thinkpads (T41/T61/T420/T520). T420 reports a somewhat optimistic "122 hours remaining" when coming out of sleep with a fully charged battery though.

If you choose the right laptop, yes. Works for me.

Thinkpad L14 Gen 1, anybody care to take a guess?

You have no idea how little that narrows it down, there's an Intel and an AMD variant.

lol so the answer is "probably not".

My apologies, it runs a 4750u amd processor.

That gen should still have "real" S3 sleep, with S2idle/S0ix (same thing, different name) being an option. I'd guess yes.

Is suspend-to-ram something that often doesn't work on laptops with Linux, really? I used it on dozens and saw problems maybe once or twice. Though I usually pick ones which are 3+ years old.

The problem is that platforms are removing S3 and S2idle support wasn't great for a while. Those problems should be mostly resolved in 2024 though.