For some reason I've seen many times the phenomenon of dev's using linux or macos, and QA using windows. Replay being available on all three OS's will definitely help unlock an entire org's potential.
Absolutely. It's really nice to be able to simple record the replay and then share the replay with others. Because replays are just websites, anyone can view them in any browser.
As someone who worked on this it was exciting to get Replay working on three platforms (macOS, Linux, Windows), hopefully proving that our strategy[1] for recording and replaying programs works.