I've built PWAs for quite some time ( a little over 10 years ).
I believe memory usage depends on the libraries the developer has included and how they decide to store the data.
The App below currently has all ( minus deactivated ) data included in the following:
https://dos.myflorida.com/library-archives/records-management/general-records-schedules/
It was installed using Chrome and includes an instantaneous 'super search' for all data.
This currently running PWA only takes up about 26MB, according to Activity Monitor.
View attachment 2280841
Is this too much memory usage?
PS. I have not installed the beta, nor tested it with Safari.
Interesting. Was that running with Chromium? I notice when building them for a site, not from scratch or of my own, but let's say of MacRumors or any site that they spawn a ton of Electron processes.
Was your PWA not a Chromium based one?