Zeiss failed not because their lenses were bad… not at all. It’s just that they were too similar in focal length to existing Fujinon lenses, more expensive, and optically not superior (probably even inferior) to the XF35mmF1.4 and XF14mmF2.8. More at the ultimate Zeiss Touit Vs. Fujinon XF shootout.
Since then, Zeiss added one more Touit lens to the line-up, the 50mmF2.8 1:1 Macro, and that’s it, no more X-mount lenses… and as far as I know, Zeiss has currently no plans to offer new X-mount lenses.
Could the Loxia X-mount sell well amongst X-shooters? I have my doubts, as we are spoiled by the excellent (and currently also super-discounted) Fujinon glass, so it’s hard to compete with it.
Some third party X-mount lenses, though, have become very popular amongst X-shooters, like the (very affordable) Samyang 12mmF2 (which I own and just can recommend).
I personally do not feel the need of the Loxia glass, but I’m also a friend of the good old saying: the more, the merrier!