I think it’s just super handy to know where you’ve been. Great to be able to find places (“Oh I loved this Thai place I went to 4 years ago in X city”)
Also to be able to find photos in specific locations (if you integrate it with geotagged photos like google does).
It’s one of those things I don’t actively care a ton about in the short term but is useful data to have in the long term if it can persist without a lot of effort.
Edit: I think form is “irrelevant” as long as it’s well supported and can be useable in different services later on. Same thing with notes imo (and why I use markdown). Has enough features but importantly is and will be well supported.