I see your point, in the sense that local software is in theory more permanent, more reliable. But the issue is more subtle that you are describing. Is the local-first program* free software, or proprietary adware? Is its sole function to communicate with some particular company's API? What is better for digital freedom, the Reddit website or the official "Reddit app"?
If a company is going to be gating their API behind some proprietary shovelware anyway, I would rather they write it in a plaintext scripting language (JavaScript) that runs inside a free software virtual machine (Firefox) which lets me intercept and control it.
*Yes, "program". How I hate "apps". Perverse term.
You are right, we also need open protocols. With Usenet or IRC or email (or even Reddit and Twitter until recently), local apps are perfectly fine, because everyone can write their own client if they want. That gives you more freedom than being stuck with a proprietary web app.
How about the common person being able to host without having to sign up for a "business" plan. Lookin' at you Spectrum for not providing the capability to manage PTR records in DNS without an artificial barrier and rent-seek.
Companies continue to encroach on what should be basic freedom to do network management. It's entirely intentional; to the point that I've about accepted there's a high-level of society push to enact as many barriers to reasonable liberty as humanly possible, all in the name of "Public safety" or some other transparent on further examination excuse.
If a company is going to be gating their API behind some proprietary shovelware anyway, I would rather they write it in a plaintext scripting language (JavaScript) that runs inside a free software virtual machine (Firefox) which lets me intercept and control it.
*Yes, "program". How I hate "apps". Perverse term.