I agree, which is why in a properly designed system you would run from initrd, its a single purpose system after all.
No need for any sd card access once the image has been read into RAM. The SD card is read-only in this case.
Also, I wouldnt trust consumer sd cards at all, they typically lack to necessary features to store data reliably anyway.
Not familiar with TinyCore myself, but I’d recommend trying Nerves Kiosk if a webpage kiosk is your primary goal [1]. Getting all of the FS settings right and a tuned system like daviduum talks about is tricky IMHO. Though it should be possible with Yocto Linux or similar as well I’d imagine, especially with ‘fwup’ or similar in the loop. Nerves uses ‘fwup’ [2] to create a R/O squashfs filesystem for the core OS image which is also highly compressed.
