We wanted test first since currently vms are on Esxi to move to xcp-ng. If everything goes well we planned to move production by purchasing the pro-support/licenses.
Later when budgeting, management wanted to see and compare prices with different products (as per our requirement).
As per our very small environment concerned we won't get any issues with VMWare if any may be 1 call per year. if any issue VMWare support its per call basis USD 49 an hour.
Also Xcp-ng we won't get issues only issues we will get only when migrating or converting VMs from VMware to xcp-ng.