JdeBPI'd like to get my hands on a VT525 one day, to see how badly modern TUI softwares work with one.
Of course, that sort of curiosity doesn't justify the expense and risk.
That thing about the VT100, by the way, is likely what Thomas Dickey (and others) have been pointing out for donkeys's years. VT1xxs didn't do colour; and people weren't imitating/expecting the VT102, let alone the VT100. They were imitating/expecting AIXterm.