But you are updating. You're spending $360-600 a year on this.
RAM isn't that expensive, even if you do feel like you need to upgrade again in another 2-3 years. I can buy a completely brand new, good computer every 3 years for that price. And it will be able to handle running 100 tabs.
There are a lot of potential reasons why someone might benefit from a remote browser, but I don't think computer processing power is one of them. My phone can handle running over 100 tabs in Firefox.
I don't know, is this an adblock thing? I currently have ~950 tabs open on my 6-year-old desktop computer, and my computer isn't crashing. I think it's currently using 8-9 gigs of RAM. Maybe my system is particularly optimized, or maybe without an adblocker websites are way heavier and multitasking is a big problem? I do run uMatrix and uBlock Origin, so maybe my experience isn't typical. But the point is, for $30-60 a month I could buy another 16 gigs of RAM.
I am sure it is uBlock + uMatrix that's giving you the boost. I use both and whenever I open a regular website in Incognito mode (in case uMatrix ruleset adjustment would be too consuming for a one-off) you can feel the fans spinning up.
Wish more people used these addons -- there is no reason why webpages should download megabytes of JavaScript to "improve my experience" :-)
You're paying THEM to update their servers at a price point you could easily match or come in lower on YOUR workstation upgrades. I don't understand how people are trying to justify this cost.