i strongly disagree - i buy some items to just enchant and sell back to store for the gold gains - but I'm also a player who enjoys (abusing) the save + load function to get useful results from enchanting. in my various playthroughs over the years i found out +12 is the maximum of a single stat roll you can get on an item by enchanting, some monsters drop up to +24 (or +25, I'm not sure here) on single stat rolls. for weapon enchants, they also seem to be quite limited (or low!) if done by using the enchanting spell. if found by a monster drop, they seem to possibly be x2 or x3 times as strong in comparison. you can also (ab-)use the save + load function before looting a monster to loot it as often as you want to get a good item and/or bug loot a monster corpse, where you get loot but the corpse won't despawn and you can loot it again. this makes it possible for patient players to loot many items from just 1 corpse, it's very tiring for the fingers, eyes + mind tho, repeating the same button presses, having the load screen flash again and again + enduring the non success until you get something you want. it can be very rewarding tho, as some stronger monsters can have extremely nice enchants on their item drop. i love looking at my chars, wearing +12 armor enchants on the best armors i found and enchanting them until i got the stat i want as high as i want it.

i've recently started another playthrough and did some research, came across the enchant on timing etc. blabla and i will test it out on 20th march, which is 1 of the recommended days to do so and see if i can get any results that are above the limits that i know of.

edit:
i hoped it would be possible to get the stronger (monster drop only) enchants but there was no difference to enchanting on 20th of march to any other day.