tbh it’s not really necessary today because there are so many ways to share files. Additionally, the distributed network has major disadvantages:
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No meaningful reputation. If you download software from a file-sharing service you’re taking a huge risk.
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Ease of use. It’s a pain in the ass to new users, which means it doesn’t thrive the way it needs to.
And the advantages aren’t what they once were. There’s so many sites nowadays and it’s so easy to set one up that being resistant to takedowns isn’t worth the trade-off.
Although, as a practical matter it provides some protection in the sense that most malware is probably not designed to do that and will, at worst, fuck up the Windows environment created by Wine / Proton. It’s not something to rely on but it is a bit safer than running something directly on your home machine as a practical matter.
(Although I guess that depends what the malware does. If it searches every document on your system for credit card numbers and sends them to Albania, that would probably still work.)