Earlier quoted context omitted.
I have several hundred open on my M2 MBA and have no problem. Maybe it's because I use Brave? I don't know but have never had to think too much about it. I also don't have much RAM (either the base amount or up a little). I do restart my browser once a month or so, if things ever feel less snappy than normal.
I think the question is why rather than physically how. Surely that amount of tabs is useless because you'll have duplicates, irrelevant things, etc.
It looks like this: https://a.dropoverapp.com/cloud/download/5cda0c76-9398-475a-...