my comment is mostly around their financial performance. it was not too long ago they were facing some headwinds, and giving the market concerns they could be sold off. Going from those concerns, to now having substantial growth, can cause some pain points for a company
Also, at least a few years ago(hope it's not still the case), a lot of their services were a bunch of open source poorly stitched together with bash, and their poor abstraction over it was leaking heavily. Their APIs were also very poor (I mean, VMware's are objectively complete shit, but at least they cover almost everything; Nutanix had major gaps in API coverage).
Oh, and they're very expensive.
I've heard stories that it's usually low cost to enter, but when you want more CPU/storage it's ungodly expensive.
Even the initial quote for three hosts was ridiculous for the CPUs offered.
And storage, a few years ago they were trying to convince us that their cache is soo good, you should use spinning disks with some SSD cache. Of course they wouldn't provide any concrete numbers, and even with hybrid storage and subpar CPUs, they were a decent chunk more expensive than traditional servers with better CPUs and a dedicated full flash SAN.
Add to that the subpar (even in their demos!) software with lacking APIs, and it just seemed extremely weird to see them getting business.
Vmware sponsored? the plugin where Nutanix made everything go through their web UI or some new convergence product they purchased.
We just wanted APIs for everything, no UI. Nutanix failed hard.