I use a used business laptop. My programs don’t care if their being run off depreciated hardware. Even if you bought a new one you’d still have access to all these cheap replacement parts and common skus. It’s still better for replacing parts cheaply and easily. If you want a repairable device for cheap, you aren’t going to buy new devices from new unknown companies that have a monopoly over the parts production. The aftermarket for iPhone batteries is so good it doesn’t matter if they’re proprietary batteries over open batteries nobody has. Even PinePhone piggybacks off Samsung batteries.