I am experiencing positive interest. We have 5 customers on subscription. 4 of those are under 5 users, so @RobertWood's observations are correct. We sold a 35-user distribution and manufacturing customer at the end of June and they are now adding 15 more to total 50. Their reason for subscription is they are part of a multi-billion dollar parent and don't want this hitting the balance sheet. I have also found interest from non-profits where they have budget for accounting and IT budgets for expenses, but do not want to go to the board for capital expenditure approvals.
Subscription is ideal for those customers who are way off maintenance, especially if the Winback discounts start going away. Those are the type of customers who are primarily concerned with monthly cash flow, so they don't do the long term calculation. When a customer does that calculation, I ask if they do that when they lease their car (assuming they lease), and the argument usually falls flat.
Combine this with hosting from @GaryFeldman and monthly access level value pricing, and for some new clients, this is very attractive.