I flew the Embraer 145 with Richard and did my command training with him.
The stale sock smell was an odour we got used to on older airframes associated with low thrust and often an icing encounter. The general view was that it manifested itself with the opening of the high stage bleed valve.
Although we complained regularly about this...nothing effective was ever done. Self evidently if, as we suspected, it was a leaking bearing seal then the remedy would have involved major engine surgery.
That was then.......
I now fly the business jet version of this aircraft, the Legacy.
I reported this smell a few weeks ago. The aircraft was immediately grounded and Rolls Royce replaced the engine............no ifs or buts.
Its would appear that belatedly the industry is taking notice (despite continued denials) and one can only wonder at the conversations that must be taking place in underwriter's offices and the boardrooms of aircraft and engine manufacturers.