I’m a lazy reader so don’t know if this is implemented but it would be cool if it could be done live with the current audio out of the system. I know this was done for streamers etc using OBS/localvocal but it’s a pain to get working in my experience - having to fiddle around with OBS filter settings.
This is how loads of things run these days. Browser handles the UI because it’s way easier to get working on all kinds of different user machines. I don’t like it personally but that’s why.
It’s how pretty much any server dashboard runs.
It has gone the same way as physical goods. My parents still have appliances (food mixers things like that) that still work and they bought them in the 1980s. Good luck getting anything to last that long these days.
As people have tried to explain - it’s not a website. The UI for the software simply runs via the browser.