n+1 still applies anyway, just the weather doesn’t make a difference to which bike I ride 😀 . Drivetrain eating will occur on the HT or FS equally so I balance it out swapping between the two, and ensures I have one bike at least to ride, rather than keeping the FS locked away to keep it sparkling, blinging and to bring it out only when it’s dry enough to show it off. Screw that, get it muddy and enjoy 😀
To be fair, my components are roughly same value and quality on both bikes, and the full sus has a reasonable design that doesn’t trap the crud much more than the HT. Plus both are 1×10 so less crud catching around the front of the drivetrain also.
So already have the HT and FS so n+1 means maybe a single speed next, or a 650b of some sort, or god forbid a 29er xc-ish hard tail (I’m shocking myself at even having considered that!).