I used to use TGS excessively and TabsOutliner has completely changed my workflow. Now I just sort tabs into categories and then kill the entire window until I am in that context.
I personally use OneTab but it's worth noting that in the GH issue on TheGreatSuspender there's some ongoing (and mostly unsubstantiated, in this thread) concerns about OneTab's data collection and management[0].
It is "mostly unsubstantiated" because the thread makes multiple claims without proof. The bookmark pages on Google provide some evidence for one of the claims but it is, by no means, proof of the claim's validity.
I've been using it for the last few weeks, and it's been pretty good so far. It doesn't suspend music tabs when they're not playing (which TGS did automatically), but nothing much to complain about.
Edit: OneTab[2] is also pretty good when you have lots of tabs open for research or work.
[1]: https://github.com/rNeomy/auto-tab-discard
[2]: https://www.one-tab.com/