I think it might depend on whether you can easily afford the time and money.
If you can, then it might depend on whether you intend to eventually buy new (or new-ish) or old.
If you're intending to start looking at more current builds, TF can give you some insight into what's available, insight into a particular builder's design, joinery, engineering, installation, access to systems, etc. And then there are some seminars, topics might be useful. Finally, mingling with some of the other shoppers -- especially those who might be moving up or sideways or whatever -- might help, too.
Those latter two would still be benefit if you intend to shop older models... but then you'll have to judge whether it's
enough benefit.
FWIW, this is opinion from having attended the first several TFs, so we haven't been to one in this century.
Might go to this one, though, simply 'cause I understand I've got a free ticket and it's just up the road...
-Chris