I’d like to compile a list and discuss machines which warm up fast. With the ever increasing electricity prices, this becomes a good feature, as leaving the machine on all day might not be economical in certain cases.
So, here we go:
Decent Espresso machine, 5 minutes;
Sage Dual Boiler, users reporting heat up time in less than 10 minutes;
La Pavoni Europiccola and Porfessional, around 8 minutes;
Vesuvius Evo Leva, 15 minutes, with dedicated group heat cartridge;
Lelit machines, such as the Bianca and the Elizabeth, which heat up in approx. 17 minutes and 19 minutes respectively, due to overheating the brew boiler to 130C for a few minutes at start up. See https://coffeetime.freeflarum.com/d/1040-lelit-bianca-or-profitec-700/81