In my opinion these movements (and the same applies to the 2892) are not designed to be hand-wound routinely. The reversers (small wheels with tiny ratchets) enable movement of the rotor in both directions to drive the ratchet wheel in one direction, they're small parts which under normal operation move slowly as the rotor moves. When the watch is hand wound they spin rapidly and that puts a lot more stress on them. This is bound to cause faster wear, but It's not easy to predict how this will relate to early failure. One thing's for certain, it definitely shortens their life, particularly when the reversers are lacking lubrication because the watch hasn't been serviced for years.
The second problem area with the 2824 is the winding wheel and sliding pinion. Compared to older hand - wound designs the parts are small and not robust. However, the problem that afflicts the 2824 is a bit more subtle: during hand-winding the back of the winding wheel contacts the mainplate. Eventually this leads to wear, and this accentuates wear between the stem and the mainplate because the stem no longer runs true. ETA don't stipulate lubrication to the back of the winding wheel but I always apply a spot of grease. Even on watches that are relatively new there's always a witness mark caused by the wheel making contact. Eventually the wear to the mainplate causes the winding wheel to lose engagement when hand-winding, causing a 'slipping' feeling through the crown. in handset the sliding pinion won' t engage properly and the handsetting will be erratic. The cure is a new mainplate, stem, sliding pinion and winding wheel . ETA parts will get more expensive and harder to source owing to Swatch Group policy, so it doesn't make sense to treat these parts as consumables!
I've worked on hand-wound 1950s watches that show minimal wear to the mainplate and keyless work despite many years of use; that's a tribute to the design and the quality of parts. The ETA automatics aren't in the same league in this respect.........but they were never designed to be hand-wound daily!
My advice is to give your ETA movement a few twists of the crown to get it running properly then wear it. Provided it's been serviced in living memory it shoudn't incur significant wear. If the auto-winding starts to be ineficient get it sorted, don't resort to hand-winding as a long-term alternative to getting it fixed. If the hand-winding starts to feel stiff or gritty get the watch sorted out, they can suffer from lack of lubrication to the crown wheel too.
At this point the 'if it ain't broke don't fix it' brigade will be having fits of apoplexy.......and rightly so! These movements do like to be serviced every few years.
Paul