I know this may be heresy, but I would kind of like them to merge the 4820/494 and 5520/574 into one model that takes the best from both. I have been diving into them as I get ready to purchase. The 20 series seems a little more refined and solid. It is wider and has more ground clearance. It also has appreciably more hydraulic flow. The legacy TYM has a larger set of cylinders giving it more capacity on FEL. Lifts more, higher and digs deeper. Breakout is much higher. It also has more standard features, 3pt adjustment lever, 2 sets of remotes, arm rests, the 3rd function is pre 'wired', and a 3pt view window to name a few.
It seems like they could take the frame of the 20 series and add some of the features from the TYM. They already have the same engine. I think this would be preferable to dropping one or the other. I propose a T4920 and T5720 be started for '24.