Yeah, older folks remember the times before browsers had any kind of memory management w.r.t. tabs. And you had maybe 8GB RAM (and that would have been considered beefy). The browsers themselves were also, more often than not, just straight up memory leaks. The longer you kept the program open, the the more RAM it would take until it broke.

No shot you could run up anywhere near those numbers of tabs before your entire system would get bogged down and eventually the browser would crash (and you’d lose them all)