I use a PC. Amazingly it can host software from many sources. Some of those sources include boxed software I ordered from various retailers, software aggregation and distribution services like Steam, the operating system vendors own proprietary software distribution system and a large number of unaffiliated software vendors that operate their own web sites.

It seems that we had long since solved the 'problem' of software distribution before Apple and Google decided to correct it.

And no, my roughly used and crazily effective PC system is not riddled with malware and viruses despite the claims of walled garden purveyors that insist this is inevitable.