I am not convinced of the idea of too much wear of microSD card, unless you have purchased a low quality card from a non-reputable manufacturer. Below is my experience which supports my opinion.
I have been using microSD cards in my 2 Pi (RPi & OPi) continously since beginning of 2015 to now (i.e. 3.5 years) without any of the two cards failing. I use 8GB, Class 10 microSDS cards, one from Kingston, other from Adata.
In addition to above two “regular-use” cards, I have couple of microSD cards which I use for trials of x64_x86 distros on my Laptop. I insert these cards in a USB card reader, burn an image on it, and boot the Laptop/Desktop directly from microSD card. These “distro-trials” microSD cards are from same two manufacturers, all class 10, some 8GB, some 16 GB, and one 32 GB. Although these “distro-trials” microSD card are not in regular use, but have undergone rigor of innumerable re-imaging and also a large numbers of full formatting (i.e. writing all zeros).
None of my “regular use in Pi” micro SD cards have failed in these 3.5 years.
Out of the several “testing” microSD cards, only one has failed after extensive numbers of formatting and re-writes.