Browsers have gotten worse. In..2013, I believe, I regularly had 200+ firefox tabs open on a laptop. It was a high-end laptop, with IIRC 16 gigs of ram, but it was still a laptop. The number may have been much higher than that - I've hit over a thousand tabs before, but I can't recall if that was then or more recently.

Multi-process firefox seems to have absolutely obliterated the performance of firefox with large numbers of tabs until recently (it seems to be have improved).