If you're only incrementing when you change a particular call, then you end up with /api/myservice/create/v2 (or sometimes this is done via header) but v5 for the update call, and understanding what version goes to what becomes a cognitive overhead.
(and really the problem isn't basic CRUD endpoints, it's the ones with complex logic and structure where what's being built isn't necessarily the same thing over time.)
It's one thing when v2 and v5 are the latest, but if someone else comes through later and wants to bolt on a feature to a service that is trying to talk to v2/v5 when v3/v9 are the latest, you have to go back and look up a map of which endpoints are contemporary if you want to add a third call (v2/v5/v2) that is supposed to work together.
This can be done via swagger/etc but you are essentially just rebuilding that service versioning with an opaque "api publish date" built over the top.
(and really the problem isn't basic CRUD endpoints, it's the ones with complex logic and structure where what's being built isn't necessarily the same thing over time.)
It's one thing when v2 and v5 are the latest, but if someone else comes through later and wants to bolt on a feature to a service that is trying to talk to v2/v5 when v3/v9 are the latest, you have to go back and look up a map of which endpoints are contemporary if you want to add a third call (v2/v5/v2) that is supposed to work together.
This can be done via swagger/etc but you are essentially just rebuilding that service versioning with an opaque "api publish date" built over the top.