I think web tech (even as resource hungry as it tends to be) is the right abstraction until your product & team is big enough to properly staff and develop for each platform. Looking at you, Slack. It's time to step up to native.

I look at it this way: Any app deploying to four platforms (web, Mac, Linux, Windows) is going to involve some level of non-native abstraction. (Whatever Adobe seems doing for their UI kit is equally terrible if not worse.)

Also: Websites are indeed software in 2023. I realized the other day that my favorite design app is Figma, and I NEVER thought I'd say that about a non-native app.

I think the optimization here is to have browsers themselves make the "desktop mode" experience much better, removing the need for Electron style projects. You shouldn't have to re-bundle the entire browser to get to it. You shouldn't have to pay $250/mo to have a reasonable installer. There should just be an install for desktop button on the web app. I believe Safari is headed this direction in the upcoming Mac OS release.