The security sandbox is a fair point. Although, embedding a web browser brings in a whole lot of extra surface area so you need to update regularly to stay secure. Electron's defaults have historically favored developer-friendliness over security and require a level of diligence from the app developer, as well. It's gotten better, for sure.

The Linux point is interesting. I have a Linux workstation I use regularly (in addition to a macOS laptop) and sometimes the desktop integration is nice to have. I just also struggle to believe a company worth 10s of billions building tools for software developers couldn't solve the problem in any other way. It feels a bit like we let companies off the hook. Whatever misgivings people have about the UI consistency, we have plenty of Linux desktop software that runs well and developed on far smaller budgets. I could live with resource-hogging vendor software if there were open protocols or APIs in place to supplant with something of my own.