I don't think vendors can stop themselves from putting garbage in their ROMs. The OnePlus One had CyanogenOS, based on CyanogenMod. That didn't last long. Now I

I don't think vendors can stop themselves from putting garbage in their ROMs. The OnePlus One had CyanogenOS, based on CyanogenMod. That didn't last long. Now I've heard the default ROM on OnePlus stuff is particularly bloated. I still use their hardware, but I only buy phones I can put another OS on, like LineageOS, or postmarketOS in the case of the PinePhone. I update the new-to-me phone right away to get the latest baseband firmware and such, then unlock/wipe/flash ASAP. Can't imagine doing it any other way now. If you buy a couple gens back of a OnePlus phone on eBay, they're pretty affordable.