One thing that startled me was how low the mating cycle ratings of some connectors are, especially in the fancier end of the spectrum. For example u.fl coax connectors which are fairly common in computing are rated to only 30 cycles, and same is for the df40 connector in Raspberry Pi CM4. Of course those ratings are probably fairly conservative, but still it has made me bit more conscious when continuously plugging/unplugging stuff.