I don't see how a comment calling out the fact the most important thing your product should do is "fill a need" is claiming you should put their needs on the back burner.
Unless you mean some of their needs.
In which case yes, that's my point. If you want a successful product, prioritizing features is very important, and in most contexts, filling your "core need" is going to add a lot more value than a native UI does.
>I don’t even use Emacs and these shortcuts are so ingrained in me that I ended up setting up custom shortcuts to emulate this in the places that wouldn’t support it (where possible, of course…).
Unless your tool is for a space where a lot of users are going to say stuff like this is a major detractor for your new product (...like an IDE or other developer tool) you're much better off just making your product and validating it.
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When you're making a new product, and bootstrapping it like OP describes, your currency is time.
Time isn't just money, it's a changing market, it's your own motivation coming and going, your overall situation can change and make working on it untenable.
The less time you spend fighting a lack of knowledge the better.
A working MVP in Xamarin.Forms in a few weeks > months spent killing the moment for your idea and learning enough iOS and Android to have the base knowledge for a middle of the road native app, is true much more often than people like to admit.