My main concern is that SD cards in the market are not reliable.
Good SD cards are, but, many are low quality, low speed.
It should force you to get a minimal speed from an sd card or (worse) use a proprietary card like Vita to guarantee realiability.
or this https://news.samsung.com/global/samsung-introduces-worlds-first-universal-flash-storage-ufs-removable-memory-card-line-up-offering-up-to-256-gigabyte-gb-capacity