I stepped up from using 35mm for decades. The image quality of MF is superb, the image itself around 400% bigger than 35mm, and by dint of that, a lot of room for contrast and tonal range to be spread out. And it's marvellous to master spot metering. I don't think there is a big different image quality wise from MF to LF (4x5) if you only do small prints/enlargements. For me, I might one day need an ULF because I persistently push print sizes higher and higher. MF has a wider variety of film available than the limited range for LF. In a nutshell, MF is very convenient, agreeable, quality and happy medium to use and I won't be moving away from it.