They might be using apps, but my customers don't want to pay for developing for four or more separate platforms (Windows, macOS, Android, iOS - also notice that nobody would develop for Linux), so they solve it by having a single platform - the web. Many of my customers previously had (only) a Windows app but found out that onboarding new customers is much faster (and thus happens more) with web apps.

.NET is dead to me, I simply don't trust the platform/libraries to continue existence and receive updates. Also the JS/NPM ecosystem is much larger and that's truly what's keeping me there.