Do you use a device with open source Android firmware? What device, which distro and what do you do with it? I have a Samsung tablet with LineageOS and apps from F-Droid. Other than displaying dire warnings about the unlocked bootloader every time it cold boots, It’s great for a “recliner system”: email, Web browsing, E-book reader and MP3 player. What do you have, what do you use it for, and how well does it work for you?
PlayStore if you want to have it. Not everyone wants to have Google sniffing on your background just like Graphene with their “playservices”… Which is indeed Google with just a few options off. But people will never be able to get it pass their heads. Op is asking about open source… Not Google source