My approach is to bookmark things and then if I feel like it's time to read up on something or just a good time to work on the reading backlog, I'll just pick whatever seems suitable at a first glance.
No, why would it be? It's sort of my curated list of things to check out when I have a free moment, just like HN is. HN curates the Internet for potentially interesting things for hackers, and I further curate from that (and other sources) for things that interest me, and have them as open tabs. It's no more "stressful" than knowing the fact that there are thousands of interesting HN links on here. They're just options of potential things to look at, not tasks to get through.
I use bookmarks as a more persistent thing, for things I know will be of interest to me long term. Some of these tabs might go into my bookmarks, but many others are interesting enough to look at/read through once, but not worth adding a bookmark for.
The grouping of tabs into trees also helps with keeping them (pretty much self-)organized. Vimium's "search open tabs" shortcut is also very useful, if I need a specific tab right now.