Not many that I can think of - I did not like the transition to WFH, but this had nothing to do with the company, and I think was difficult for lots of people. The awesome thing about ERI is the culture, and it felt like it just wasn't the same with everyone working remotely, but I fully expect that once we can all start going to work again things will continue as they were before.
Also, if you aren't into the constant learning aspect you might not fit in well, I think it is expected that the technical employees have interests and professional development goals that they want to pursue. This was not a con for me but could be for some people.