I don't really plan on dealing with UHD Blu-ray discs. The BDs I do have and plan on buying in the future are not UHD. 17 can play from BD ISOs, so that part is already covered. Any reason(s) to upgrade from 17 to 20 that would make spending US$70 worth the investment? I have Power2Go 11, and I really don't see any need to go to 13. I didn't even know I owned it, have never used it.
IIRC 17 & 18 had the video level wrong on 4K displays with Nvidia cards. If this isn't a problem for you, don't upgrade. 20 has no 3D support, if you need or want that.
That's why I keep 10 and 16-19 on my Win10 Pro laptop. I don't have any 3D Blu-ray discs right now (I lost the ones that I had when I moved some time ago) but it's nice to have software that can play those movies when I need to.
I doubt I will be doing anything 4K for the foreseeable future, and 3D is just as unlikely. Thank you for the replies, James and whatever. I have a small collection of 'regular' BDs that I will be backing up. I don't have a 4K UHD stand-alone player, and I'm more than happy with the picture quality BD has. I don't have a home theater.
There was no point of me upgrading PowerDVD 18 to 20 and reclock is not supported. Need that for some of my region 2 DVD's and BD's. Plus I don't think I'll ever get UHD's anyway.