I don't have a problem with my TDS460 (not A; no floppy, 350MHz, and needed a recap). EQ acquisition is ponderously slow, but it's rare that I'm looking at a fast signal that is not repetitive in some way, so it gets there eventually.
Bigger gripe is basic usability; Tek menus in the 80s and 90s were TERRIBLE. Well organized, but SLOW. If you have the choice between a contemporary HP/Agilent (546xx series and the like) of equivalent specs, I recommend it over Tek. Their menus and displays are real time.
Most modern offerings are at least as good, with poorly organized menus being the most common failing. Quirky acquisition is sometimes a thing, too (e.g., step response of entry-level Teks, bandwidth control, voltage range and PLL quality, etc.). Acq and display is almost always better than of the olden days, with real time readouts, "DPO" effects and such being the norm. Not to mention more pixels and modern interfaces. And protocol analysis, and...
Tim