Booking.com or frankly any other aggregator are great until the moment you have a problem and need to talk to their customer service. In that moment you realize that Booking.com does nothing that you can't do by yourself with same effort.
On rare occasions, using a 3rd party site will net you a better deal, but often, it's the exact same price, or a price within just a few dollars.
But if your reservation has a snag of any kind, you're basically fucked. The hotel will tell you to talk to Booking, Booking will tell you to talk to the hotel, if you can even talk to anybody.
I'd rather spent the extra dollars and book directly and just not have that worry.
Kayak was the absolute worst about this to me. I had purchased premium economy tickets to Japan for several thousand USD from Kayak. Japan closed. The FAA made it clear that refunds were to be awarded. Kayak jerked me around and tried to keep half my money. Eventually I got it back less $400.
I don't have a lot of experience with Golang and AI, I think Rails can give you different kind of productivity.
From what I know (please correct me if I am wrong) most people use AI to create scaffolding and automate all boring and repetitive tasks in a project. So code still needs to be written, you just outsource it to AI helper.
In Rails you write less code and concentrate on business logic because everything boring like DAL, authorization, caching is already written and tested in production.
Apple Notes is pretty close to perfect for me - it's just missing Markdown support and backlinks.
I did just figure out how to link notes together with the '>>' shortcut, which is a game-changer. I've tried a bunch of other apps, but I always come back to Notes.