Hold on! At this very moment I am down to 755 tabs with the goal of shrinking 50 a day. Some days I go over, some days they grow.
For the things I do it IS necessary and yes, it overflows. On many days I just can't get to enough of them and simply run out of time! It would take way way way too long to explain what I am doing with all of them and why.... Some other day...
Having said all of that there is an alternative for the OP: Run a single threaded browser instead. Chrome may be the biggest browser- and they did a masterful job of extinguishing the competition- but it isn't the best. It' isn't even close.
Try running Pale Moon. Not only is it single threaded- which means you could run thousands of tabs if you so chose. The trend is for browsers to be Chrome clones and go multi-threaded and bye-bye system resources!
Now, as indicated above, not all tabs are created equally and some of the most heavy ones currently are YouTube- even with HTML5 toggled on/off.
It is possible to lighten many page loads by toggling things like scripts, XSS, plugins(such as Flash, Java..), cookies... When Flash was more of a thing I regularly lightened the load by about 25% just by shutting it off.
Why has nobody heard of Pale Moon? The #1 problem with it is it's developers. Wow can they program! Their personalities...? IMO a totally different kind of WOW!
Anybody who has ever watched Shark Tank will get this one. Sometimes somebody creates something new and wonderful. Then the more they speak the more it becomes obvious that as long as the creator is in charge the product is doomed.
When you think of PM think of what Firefox used to be. If you want to go truly open source and not a lousy Chrome clone go with it.