Shimano really should have turned to shit, what with them effectively having a monopoly (in mountain biking certainly) for literally decades. I don’t know whether it’s a Japanese thing or what, but they never did. Just kept quietly putting out decent gear at a variety of price ranges.
I picked up a full set of XTR v-brakes from eBay a few years back. Those things were still as good as the day they were new, despite being old enough that I only paid £20 for the lot.
Well, that technically applies to all watches. They are just water tight to a certain degree, but none are completely waterproof. Depending on the ATM rating a hot shower can be enough to kill it, whilst others can survive diving hundreds of meters deep into salt water