VHS/DVD Dubbing decks

[kennynd]

Hello. I have an old Go Video vhs/dvd dual deck that is showing signs of deterioration. I have made literally hundreds of vhs to dvd dubs
including commercial vhs tapes. In fact I've only had one vhs tape I could not dub due to encoding!
In shopping around for a new unit I notice some reviewers say their unit won't copy commercial tapes.
What I want to know is-have specs changed over the years in terms of copying commercial vhs tapes?
Are there differences between brands in regards to this?
I have been looking at Toshiba, Magnavox and Panasonic units. Can anyone share their experiences with these or any other brands of dubbing decks?
Thanks in advance for your help

[hech54]

What I want to know is-have specs changed over the years in terms of copying commercial vhs tapes?

No. You were simply lucky in two ways.
1) The combo unit you chose ignored Macrovision.....lucky.
2) Your combo unit lasted "hundreds of tapes" - EXTREMELY lucky - combos are notorious garbage.