The 35mm format is excellent for reversal-to-Ilfochrome printing if you adopt an holistic approach to quality from image conception to finished frame job and display. Working within its limits and using the best quality optics you can afford, I am absolutely certain people can do the same thing I am doing with 35mm, if only they adopt the discipline and drive. A lot of people think my framed 30x45cm Ilfochromes were shot with large format, but no — not ever.
I am not a fan, never have and never will be, of the reversal-to-scan and print methodology — lasers, inkjets, Pegasus or whatever they call it. Gamut loss from the reversal palette to RGB is too great and bothersome to try and correct. Only Ilfochrome will carry through the image faithfully.
Correcting some odd observations, large format lenses do have the defining edge in resolution and linear sizing for printing, but how many people actually print to the enormous Ilfochrome image sizes from large format — which is to say, getting the very, very, very best result from their investment? Here in Australia, I know of some very, very wealthy photographers who print mega-expensive panorama Ilfochromes from 6x12cm. Good on them. Way to go. The whole point of shooting reversal film, especially, on large format is lost — a travesty — if you only scan and output to inkjet, laser or whatnot, too often as an after-thought to a lot of effort. If big Ilfochromes from LF don't appeal, stick with 35mm and work within your budget and the format's boundaries.