I think it depends on what boots you wear, and how they are lined. Also, your degree of foot perspiration, etc.
Boots with lots of dense padding tend to stink. If you use a dryer, you may not notice it because the stench may be trapped in the inner layers of the padding - which dry much slower. Boots using increasingly dense padding act as a reservoir for perspiration/dead skin cells, etc.
When a boot feels dry, the inner layers of the padding may not actually be dry at that time.
I never used a heated dryer, as it promotes bacteria and fungal growth, and breakdown of the leather if the uppers are made of that material. Risport, Jackson, Edea, etc. They all stunk eventually. The only mitigating factor was how often I wore the boots and how hard I skated in them - basically, the degree of perspiration and other elements (like dead skin cells, etc.) that I was dumping into the boots.
The only boots that I've ever worn where I could - basically forever, no matter how hard I skated in them - just own and never worry about stench were those that were lined with leather on all inner surfaces (entire boot upper + tongue). Like SP Teri or Harlick Clarino leather lining. And I think Riedell has that option and Graf Edmonton/Washingtons come that way standard. Because the leather doesn't absorb moisture as readily, most of that stuff comes out of the boot when you remove your foot [and sock, if you wear one] from the boot. It's also easy to remove much of the residual stuff from the boot by simply opening it up after removing it from the foot and wiping the internal surface down with microfibre (takes... 30 seconds or less). With padded boots, most skating socks/stockings wick moisture outwards and into the padding, instead.
My 12-year-old pair of SP-Teri KT2 boots, which I have worn a TON (I was probably skating 20-25 hours a week), still smell like new boots. No padded boots I've ever owned (I cannot even count) could ever hold up that well to stench. The only thing that would develop a stench in those boots, were the SuperFeet insoles, and those get replaced ever few months so I basically used that as a barometer for when it was time to replace them. The inside of the boot (footbed) is leather with a metal heel, and there are also no "air channels" where things can fester (Risport, Edea).
I literally never experienced boot stench until I got those padded Risport RF2 Supers. Before, I wore Klingbeil & SP-Teri, so that wasn't an issue.