Uh, much wasted time for one? Be it due to destroyed filesystems because of ugly hard crashes,
because the optimizations I applied during compiling without really understanding them(at that time) gave me many, many surprises, or the potential of destroyed hardware?
Yes, you could overdrive your screens into magic blue smoke.
Or speaking wrong to some interface-card, say SCSI, or ATA-CDROM.
All of that could happen. I only suffered from destroyed filesystems, though.
It isn't wasted time if you learn something, though, is it? To be fair, as a hobbyist I only ever really experimented as far as I could afford if the hardware broke, and anything too experimental I kept the only version of any data off of (that used to be way pricier in time and materiels though, true).
