Im surprised more on this thread aren't talking about the implications about United sending out 193 WARN letters and Delta, American likely to be following soon with WARN notices to significant percentages of their dispatch groups. I wouldn't be surprised if Southwest ends up sending WARN letters this time.
If United, AA, Delta, Southwest furlough even 60-100 each, the effect on the careers of many will be devastating. Not only for those that will be out of a job but those wanting to advance to the majors will likely see a much longer wait. In a normal year, 60-100 is a lot of hiring. Just recalling that many will likely take a year or two. If furloughs are in the 150-200 range, it will likely take 3-4 years just to recall everyone when retirements or growth dictate more staffing.
If the other regionals furlough like Republic has, those wanting to get into the business could see a multi-year wait. The era of one year wonders in this business is over for now. I would plan on 5-10 years right now before we see hiring at the big 4. When it does start again, I am not confident that we will be seeing multiple classes of 20-30 every year like we were pre-virus.