I think that the saddest situation with FV is the cost of building a car. I purchased my first FV in 1968. In constant dollars (a term only economists use) FV has gone from about 30% of medium income in the mid 1970's to 50% or more today. And I think we had more disposable income with a middle income salary in the 1970's.
As a builder, I don't think I could do a run of say 10 cars and get them out for less than $30,000. Unlike years ago when I could get all the VW parts to build a car from a VW dealer or junk yard, now I would have to scrounge and spend a lot of time and money getting the necessary VW parts. Where would I go to get 10 transmissions that were race ready for a run of cars? Could I get a competitive engine and transmission for less than $10,000? Much of what is available today is not up the standards of the original parts and not suitable for racing applications.
I think the disk brake option is just a fix until the next parts issue comes up.
I find this situation depressing. But I still feel that for an entry level race car, FV is the best place to start. FV is the best class to teach some driving skills that will work very well for any faster car a driver races and if they get to Indy, those skills will be invaluable.