Yes, that's right. But we are using VDI "wrong" anyway the whole time because our needs just don't fit the floating disposable VM scenarios. User experience (at least for us) is not good enough with disposable VMs.

Right in the beginning, about 6 years ago now, I tried using floating Linked Clones with persistent user disks but that was a complete mess - just a few days into production use the first profiles were lost because Horizon was unable to put the right things together. We reverted to using VDI old school with roaming profiles, just like the physical desktops were using too. As our VDI hosts are all connected with 10g to the server cluster hosting the file server, loading the roaming profile (somewhere between 50mb and 4gb) was never a big issue.

Besides dedicated Instant Clones we also host some customized VMs in a manual pool - these would be the ones that need special applications like Adobe Creative Cloud or things like that.