Upload & Sell: On
I'm on my second Oly 24/2.8 MC, and it's definitely better than the one I had a few years ago. I'm about to take delivery of my third Oly 21/3.5, this one is single coated. The previous two were OK, but didn't live up to my expectations, based on the comments of many contributors here on the Alt forum.
I also have Oly 50/1.8 and 200/4 lenses, and they're great - one copy of each. I had an Oly 50/1.2 for a few years, and it was great, too. My previous Oly 55/1.2 was a bit disappointing, but that's completely in line with comments of other users.
One thing that I can say is for focal lengths of about 28mm and wider, the quality and accuracy of the adapter has a very large influence on lens performance. Now, once I find a "keeper" wide angle Alt lens, I get a Leitax mount for it (if one is available).