I had been using LineageOS + microG for many years on my Pixel 3. I upgraded to a Pixel 8 and tried out GrapheneOS and the install experience was good, but I found some odd performance quirks - apps would be slow to install and run, downloads were slow, etc. Has anyone had similar issues?
Many apps that work on microG don't work in GrapheneOS without installing Google services anyway. I'm by no means across the full privacy implications, but my feeling is microG balances privacy and usability better for me.
I've since switched back to LineageOS+microG and am happy with it. Just my experience.
A lot of developers are lured into building in a dependency on Google services, so yes you'll need microG or, as GrapheneOS prefers, the original Google code running on your device for those apps to function. Or patch the app, like Langis does for Signal (not necessary for it to function without Google in this case, but it removes its calling out to Google's apps and services for those who don't want that). If you're happy with that setup and don't need protect-from-the-government levels of security (street thugs aren't going to ransomware your device by abusing an unlocked bootloader or send exploit chains that work on anything but the hardened allocator), LineageOS is probably the better choice for you. GrapheneOS has some nice things like easily denying the network permission for an app (even if they could theoretically work around it with intents) and having a custom A-GNSS server, but you can do the same on LineageOS by using root and something like AFWall+ for the network and configuring Graphene's A-GNSS (SUPL) proxy in the system settings (don't forget to donate if you use it and are able)
>but I found some odd performance quirks - apps would be slow to install and run, downloads were slow, etc. Has anyone had similar issues?
not sure about downloads specifically, but app installs are slow because grapheneos forces AOT compilation (JIT is disabled), presumably for security reasons.