My oldest corded drill is a B&D 3/8", bought it used for $10 just over 60 years ago - even today, if you're half asleep when you pull the trigger
you shouldn't pull the trigger 
Also - the
power cord is ORIGINAL, and is STILL in better shape than the brand new **** you get today -
I agree that the choice between cord/cordless depends on several things, one being "whattay got??!?" - for me, if the job isn't moveable and it's further from power than 100' of #12 cord, the tool and a handful of batteries goes in a tote in the back of the golf cart - OTOH, I only own
ONE battery side grinder, but have over a DOZEN corded ones - when I'm fabbing something it's nearly ALWAYS somewhere near one of my weld tables, which are ALWAYS near 120 and 240 volt supplies. I have an old hand truck I added a rack AND a power strip to, rack holds up to 6 grinders at a time (all plugged in) - lets me keep slicer disk, grinding disk, cup brush, knotted brush, 6" brush and a flap disk available in a couple SECONDS and NO battery swapping.
Nearly ALL my battery stuff (except batteries) is about 12 years old (the result of insurance payout for a $6k shop "visit") - they're a mix of DeWalt and Milwaukee, not sure what I'd replace 'em with if another "visit" happened, considering EVERY brand seems to be made by the lowest bidder these days; doubt it'll be a prob tho, last time happened just after both Dobermans and the Akita died within 2-3 months of each other - we will NEVER AGAIN be without at least two dogs in THIS lifetime... Steve