It's hard to separate just the period of the convoy from the rest of the pandemic. What it does is add an extra three weeks of torment to companies that have already done everything possible to maintain a stable environment, as stable as they could, and then they had to restart again.
A simple example would be if you're a restaurant and you're planning for the opening. You've brought in all kinds of foodstuffs to be able to prepare for a really important opening, which includes Valentine's Day. You're unable to actually take advantage of that market opportunity, and it sets you way back. You have to carry the costs. You have to throw out the food. You really are in a tough place. On top of everything else, you have the incremental cost of bringing in inventory—in this example, food—that is a complete and utter waste.
For the long-term effects, I guess we will see what they look like, but it certainly added an enormous burden to these companies that were already in trouble.