It's definitely tough but our Renault Zoe fit a Cybex baby seat and toddler seat with the front seat still useable and the Tesla fit them both with plenty of room.
We were actually choosing between the Cybex and the Maxicosy, went with Maxicosy in the end.
Our car was already only really just big enough (2x dogs), so I'm not averse to getting something bigger. It'll our only car for the time being, so it's balancing size vs ease of daily use.
It's definitely tough but our Renault Zoe fit a Cybex baby seat and toddler seat with the front seat still useable and the Tesla fit them both with plenty of room.
I guess it's too late to change car seats?