Do power conditioners “burn-in” & thus improve with age?

My Bryston BIT-15 power conditioner has been running continuously for about 2 years. I used to have some harshness and muddy, hollow bass with my system.

over the last few months I have noticed being drawn in by the music. I’m not sure what got better but something did. I have Thiel CS3.6 speakers that did not sound particularly great when I first got them. My audiophile goal for them these past 2 years is to make them happier and happier. I have been told that Thiel speakers are great for auditioning components. You can really hear the differences that my different digital sources make. 

Anyway, I was just wondering - does anyone know about burn-in with a good sized power conditioner? Mine does have a heavy copper toroidal transformer and I have been told that Bryston BIT power conditioners are manufactured by Torus. They just fit them with a Bryston face plate to coordinate with the other Bryston components, visually. I’m not aware of any difference functional, although I don’t know the equivalent Torus model. 

Anyway - if you can attest to a sound conditioner whose sound changed over time as a result of “burning in” I’d love to hear about it.