I've thought of this myself. As devices get more integrated, it could be worth having a professional with the right tools and machinery to upgrade laptops/phone

I've thought of this myself. As devices get more integrated, it could be worth having a professional with the right tools and machinery to upgrade laptops/phone/tablets by unsoldering and re-soldering in new modules. Upgrade your RAM for cheaper, replace NAND Flash modules near their write capacity or slowing down with fresh ones, breathing new life into a device... There might be a market for it, also it would be an eco friendly way of upgrading old devices so they remain usable instead of throwing them away and creating more e-waste