It sounds like your trip was a positive experience. Your preparation was good, targeting things you wanted to buy, or to check-out, and with some info on what specific things others found lacking in durability. "Don't buy anything you can hold in your hand," probably is about as-useful advice as a couple of posts I saw here, which painted with a very-wide brush, about 'what not-to buy.'
I have one of the old, Chicago Electric 4-1/2" side grinders w/an orange plastic case. It's I'm guessing, close-to 20 years-old. I've used it mostly for cutting steel during its time in my collection. The HFT grinding discs, abrasive wheels, and flap-discs are usually what I've used with it. Rarely have I had any issues with the cutting/sanding/grinding disposables. For-sure the price is right.
'Avoid all corded tools," if you do, your positive experiences will never occur. I haven't bought any HFT cordless tools, so I have no experience there. My corded HFT multi-tool has done great service for me, if I'm going to be using it continuously, for hours, I wear heavy split-leather work gloves, which provide a bit of insulation from the vibration. I haven't had an experience where it's gotten to-be too-hot to hold, bare-handed.
Another tool that has done well for me is an SDS-Max corded demo hammer-drill. It paid for itself the first job I used it on, demo'ing two bathrooms down to the CBS walls or stud walls, and to the floor joists. I've used the carbide-tipped HFT SDS-Max drills, and the variety pack of chisels of 4 profiles. When I needed a replacement for one of the wide spade demo bits, while working on the second bathroom demo, I bought a Bosch, which cost almost half of the cost of the HFT demo hammer drill. It's still in the original packaging, because the HFT replacement I also bought is still working.
Those are the corded HFT purchases I've worked-with the most. I've also used a HFT sandblasting kit, and a soda blaster, which works very-well for cleaning chrome parts on the motorcycles I have as hobby projects, and also cleaning die-cast parts on the same. I have a pair of HFT water pump pliers that appear to-be the equal of my Craftsman pair of the same tool I've used for 40+ years.
Since I've already got SK, Wright, and vintage Craftsman hand tools, bought new,I haven't had much need to purchase things like socket sets, ratchets wrenches, screwdrivers, and the like. I have bought HFT open-end crows-foot wrenches and flare-nut crows-foot wrenches just to try them out. The few times I've used them, they have worked well.
I suspect the real test of the worth of HFT for you will-be, "if and when do you return, to purchase more useful tools, and what your experiences are." If you buy something and it just sits, never being used, you won't be able to tell us what happened when you put it to use. My contention is that when you need something, HFT will-be on your list of possible sources for fulfilling your tool needs.