It doesn't make sense at all. So as a user how do you choose which model to use? There could be 3824 models to choose from. The browser might as well set one as default, and we all know how that goes (see: search engine).

Not to mention many other UX questions the come with this, most importantly, how unusable these local models are on regular 3-year old laptops that are constrained in RAM, GPU/CPU capability and likely disk space despite what enthusiasts say here. (They have a Macbook Pro with 32+GB of RAM, reports it works great with xyz model -- fine -- but somehow thinks it works for everyone and local models are the future.)