Same old story with cart's as anything else, a general rule - assuming the rest of the kit warrants it, never listen to anything more expensive than you already use, unless you can find the cash for the more expensive.
I suspect that most people have an imaginary "sweet spot" in terms of price - a combination of what they can spend and what they hear. For me, MC - probably 1000-1500 (new price) - beyond that I have not and will not listen as I feel happy to tell myself that beyond that, returns become ever slighter per £ expended.
Another same old story - I got the bulk of my LP-replay a long while ago, but I also essentially never buy new. As and when I need a new cart', there will/should be a nice trade-in on my current one, so not full whack price for the new one.
A personal thing - I have abysmal aural memory, so gave up trying to judge deterioration of sound from a stylus, long ago. I own two of my preferred cart' and the two arm pods on the Hypersapce makes life super-easy. If I ran MM, life would be easier again - just keep a spare stylus and swap.