The only downsides are the loss of Samsung-exclusive features (like Smart View or S-Health – not relevant on this tablet) and the SD video limitation on Netflix. For web browsing, YouTube (via NewPipe or ReVanced), reading PDFs, and retro gaming (ePSXe, My Boy! GBA emulator), the SM-T550 with a custom ROM is fantastic.
Before you start the process of installing a custom ROM on your SM-T550, make sure you: sm-t550 custom rom