That's good, but if you're not copying content or caching to the card you've barely got a couple of gigs written to it over that time I'd think.
That is the point. To don't mess the "system" card with data. I'm using "small" (32-64GB) SD cards for Libreelec and a bigger USB3 stick for any data (speed and capacity enogh for me, also energy efficient). As my RPi's running 24/7, I don't care about the boot time... and in that way I don't have headache when need to reinstall the system...