More like a portable CS that can be placed in the documents directory and run from there. I remember my son's cousins installing software while not as admin on my Windows PC by installing in the documents directory. CS, AOL Chat, etc.
A good way to get malware as well. I could never trust those cracked versions. One cracked version made CS 1.6 with Navy Seals looking for bin Laden, which I thought was fun.
The first two are trivially solved by portable applications (AppDirs, Application Bundles, AppImage, etc.). Platform independence is only kinda true, as many of these things don't actually function correctly on anything but Chrome, so they effectively target just one platform.
Those are all very minors inconveniences. Installation took a few clicks, disk space is negligible for that category of apps (and if it isn’t re-downloading on each access is a more pressing issue). Only the platform thing matters, yet the exemple you give isn’t convincing given it’s super low market share.