"Only?" probably none However, recently there was a healthy thread about the massive trackers found in mobile apps[1] which wouldn't be a problem with PWAs sin

"Only?" probably none However, recently there was a healthy thread about the massive trackers found in mobile apps[1] which wouldn't be a problem with PWAs since they live in the same sandbox as the browser (meaning no exfiltrating all the shit) but yet can one-click launch from the normal app mechanisms and (AFAIK) can be the subject of Intent handlers just like apps 1: https://news.ycombinator.com/item?id=41923931 https://news.ycombinator.com/item?id=41923931