I'm 100% in the every-new-installation-should-use-the-Wall-Connector camp.
Years ago, when the Wall Connector was ~ $1500 dollars, and the ~ $500 UMC could charge at the 40A max charge rate of most Teslas at the time, and there was no GFCI breaker requirement for EV charging outlets...then it made perfect sense to install a 14-50. That's why I have a 14-50 in my garage, with a gen1 UMC permanently plugged in. Saved $1000 minus the cost of a quality 14-50 outlet.
Now with Wall Connectors priced at $500, newer UMC limited to 32A charging, and the GFCI breaker requirement...there is no reason install a new 14-50 for daily EV charging. A Wall Connector is faster, safer, cheaper (vs outlet + GFCI breaker + extra UMC), and physically more convenient.