I haven't seen a newer bike with a threaded headset, unless you shop at walmart. Even shimano is moving away from loose bearings in their newer hubs, I still have a few wheels with shimano hubs with cup and cones. Still have a couple fairly new bikes with square taper BBs but I am not seeing any newer bikes that are in the higher end offering that have that stuff anymore. I just did a service on a square taper BB and man they are easy to work on, I would take working on that over beating shot pressfits out of a frame anyday.
earlier this year i bought a new wheelset. site was having a blowout, of I guess new old stock components that were higher end at one time. I couldn't resist as I figured that high end clincher rims may be hard to come by in the future. Nothing aside from the spokes/******* and rim tape were current from the manufacturer.
Ultegra 10 speed hubs (cup and cone), DT Swiss box section rims for clinchers, Sapin spokes and ******* 32 and 3cross, and velox rim tape. I believe they built them when I ordered them, but no substitution were allowed. The only thing I would have changed would have been 14/15/14 double butted spokes instead of straight 14, but for the price I wouldn't complain. I'll be able to fix these and my other wheelsets as they are similarly built. Loose bearings and J-bend spokes.
I replaced/repacked the front bearing on one of my wheels earlier this year. 90's Shimano hub. Cone wrenches and that's it. It's nice to just have several of bags of standard size bicycle ball bearings to cover all my fleet.
I have some old Mavic wheels that have the press fit bearings, I've resigned then to hang in the garage and trainer use or as a rim when I patch a tube and install it there to check if it holds for a while. They did give me a good ride for a long time though. If I wanted to service them, I'd need to buy a bearing puller and order the sealed bearings of the correct size. For the press, I have a threaded rod with nuts and washers that I've used for headset installs. That would likely work for those hubs.
There is/was an elegance to adjusting hubs, headset, and bottom bracket with threads. Although for the bottom bracket, the screw in cartridge for me is pretty much screw it in and forget it. The only reason I still have a cup and cone bottom bracket on the trainer bike is because I don't use it that often. I wouldn't run one outdoors at this point in time though. Just get a square taper cartridge that would fit. The crank is an old Sugino square taper, and I'm too lazy to figure out what taper to use so I just keep it as is.
