I personally consider modern 2P tents to be too cramped for 2 people.
It was only several years ago that you could find what I would label as "standard" 2P tents and "wide" 2P tents.
For example, you can still find specifications for the "
Mountain Hardware Drifter 2" and the "
Big Agnes Lynx Pass 2". Both of these tents had rectangular floors, with the MH being a "standard" size with dimensions of 93"x50", and BA being a "wide" size with dimensions of 90"x58".
But today, it seems like every major manufacturer is now only making "small" 2P tents that follow the dimensions of the
Big Agnes Copper Spur UL2. This is a tent with a trapezoid floor 90" long, 52" wide at the head, and 42" wide at the feet.
You also have to account for the fact that these specifications are based on where the tent poles hit the ground. The actual usable space inside these tents is about 5" smaller than the specifications. The results are that if you are using "standard" size sleeping pads (72"x20"), the pads basically have to abut each other to fit inside "standard" and "small" tents... and if either of you is using a "large" size sleeping pad (77"x25"), two sleeping pads simply will not fit inside a "small" or "standard" size tent.
Even today, as my son's have gotten older, my "wide" Lynx Pass 2 has started to feel a little cramped for two of us. So if I were in the market for a 2 Person tent for me and a spouse, I would be looking at modern day 3P tents.