The ECB's response to the 2008 crisis was flawed, to say the least - especially compared to, say, the US Federal Reserve. The ECB's measures were slow, indecisive, and limited in efficacy. As a result, they didn't help European economies as much as they could have. It would be unwise to put too much stock in their measures.
In addition, the conditions of today's world and today's economies are very different from those of 2008. This is especially the case in the wake of an unprecedented global pandemic. The worst thing for the ECB to do would be to recycle the same flawed measures they took more than a decade ago, and apply them to today's world. At best, it would take them a long while just to come up with a new strategy - and even then, the effectiveness of that strategy isn't guaranteed.