Now I have a few years worth of photos, probably > 100k. What should I do with them?
Be realistic: 500 picture per day. Most of them must essentially be duplicates and/or poor quality, and you're never going to go through them again.
It's fine to take plenty of pictures especially now that it's free. But the benefit is not that you can keep so many pictures, it's that you can take sort them afterwards and keep the good ones without worrying about having missed something.
I also take thousands of pics when travelling...well used to anyway before Covid. Then I store them all in some cold storage, like a backup HDD so they are handy, and look at them again after 1yr or so. By then the important memories of that trip are cemented and I can easily delete the irelevant ones. By then you will know which are important and which need to go in the bin.
Most photo managers use timeline views that make shutter-happy events overwhelm all the other events that might only have a couple shots.
I built something different: it uses random sampling and hierarchical tags to make browsing and rediscovery fun, even for very large (500k+) libraries.
Details are here: https://photostructure.com/faq/why-photostructure/#fast-and-...
(I'm making the PhotoStructure beta available for free in exchange for feedback, if you want to try it out.)
ps. I've built something that more or less does that, only works with Flickr albums and the interface is very rough: https://ash.code27.co.za/
If you have any questions or you find anything odd, confusing, or buggy, please let me know. Email is in the website footer.