Someone on Dragonsfoot asked "what edition should I use for a 1:1 game with my wife" and did a poll. The usual answers... and then there's mine. I'm probably going to get banned for the "self-fondling" part...
I've been running a 1 on 1 with @thePrincessWife on and off for almost 6 years. We've had a recent long term hiatus, but the main point is that I've been doing this. My wife didn't know any specific version of D&D, just that she played BITD.
So... I voted "other" because it doesn't matter in my 1:1 with my wife.
If you ask @thePrincessWife about specific mechanics or rules, she has no clue. Even after 6 years. FWIW - I've moved from microlite20 to Swords & Wizardry 2nd edition to S&W White Box to almost base OD&D/LBB, using a lot of Delta's rules and Philotomy's Approach. Does she know? Nope.
However, if you ask her about her character, what her character can do, what her character has done and what she's hoping to achieve, she'll tell you all about it. I tell her what to roll when it's important. If she asks if she can do something, I figure it out and tell her. If dice need to be rolled, I tell her about it. She spends more time on her CRS in the money and treasure section.
And all this is as I think it should be. Edition-self-fondling is, IMO, mainly for the DMs and (perhaps) people who want to put an emotional flag down on their sacred elf-game book set. Me? I just wanted to play D&D with the wife.