Close, but not quite as there are manufacturers that employ “non proprietary” parts that can be obtained from multiple sources. Such parts use common mounting dimensions, similar sizes, common size and power rating descriptions, and are often employed on numerous models.
The popular name manufacturers have planned obsolescence as part of their business strategy. Any company with a practice of superseding models on a frequent basis is letting us know that whatever we buy will not be supported in one manner or another for very long after a new model is released.
Battery supplies are a typical means of forcing model replacement as once the power supply becomes unavailable we either buy a new model with available batteries or cease flying. For systems using proprietary batteries, plan on 2-3 years from the original product release date as a life cycle estimate as that is about how long batteries from a production can be expected to be useful.
It works out we need to consider higher end purchases not only with what a system can do, but also with how long it will remain viable to do those things. It may well be that a system that is terribly convenient might ultimately be inferior to systems that offer similar functionality but with less convenience because replacement parts and power supplies will be available much longer for the less convenient system. There’s also the ability to transfer optional payloads from one system to another to consider.