For those who think prices will eventually return to what they were in the Before Times, all indications that I'm getting point to prices staying "high" for the foreseeable future.
From what I'm hearing, prior to Spring 2020 prices were unreasonably low, and we saw a number of saw mills and lumber yards close shop due to razor-thin margins (as I understand it).
In the present times, most of my suppliers are honoring their quotes for 7-14 days, with no guarantees on inventory or delivery dates. One local hardwood seller was telling me the other day that (at some unspecified time in the past) that their price on White Oak had remained static for 5 years. In the last three months, they've had to bump the price $0.20/bd-ft every week to cover replacement costs, with no end in sight. It's my understanding that softwood lumber wholesale pricing has doubled in the last three months.
A real-world example of this would be my friend's addition. I helped him build the addition in 2018. Once the space was completed, his insurance agency determined the replacement cost was in the ~$350K range. Earlier this Spring, his insurance carrier sent him a notice that they've revised the replacement cost to ~$700K+, based on current market costs of labor and materials.
Looking forward, my interpretation of the tea leaves is that we might see prices fall ~10-20% in the next 2-5 years, but I doubt we'll ever return to Before Times pricing. It's the cost of doing business, builders and customers need to adapt.
Shannon covered part of this in detail (specifically, hardwoods) in one of his recent podcasts:
https://www.lumberupdate.com/45-covid-hardwood-impact/ (0:00-23:00).
For myself, I'm giving customers estimates based on current market conditions, with the caveat that I will not give a firm bid until 30 days prior to start of work, and even then, that pricing may be fluid depending on how big the job is (if it's a big job, trim/millwork will be nailed-down ~2 weeks prior to ordering)...