sure, the regional airline industry is in the cross hairs of accelerating mainline retirements due to pilots now reaching the 65 year old threshold, FAR 117, and pilot demand outside of the US that is draining resources from US airlines... on top of the poor economics of much of the US RJ fleet.
But not every airline -regional or mainline - is going to be impacted in the same way by the RJ pilot shortage. Some airlines have been expecting this and preparing contingency plans - if not ensuring that they gain an upper hand in the whole process - while others are being caught flat footed.
Specific to your interests, I am very bullish that the mechanic shortage is about ready to prove beneficial in pay for US airline mechanics and in new hiring. The mechanic shortage is real and it will result in a resurgence of the industry - but not as fast or at the same time as for pilots.