Well I had a flight that was cancelled due to the Flybe Collapse. I rang and was granted a cash refund: This was March 10.

Now, I get this email, April 22:

The outbreak of the coronavirus has led to significant impacts on all industries, the aviation industry is facing major challenges with unforeseen consequences right now. Unfortunately, as you experienced, many of our flights are cancelled. We are doing everything possible to assist our customers in rearranging their travel plans. Given the exceptional circumstances, we will issue your refund request by a voucher in the amount of your original ticket price, to use as payment for future KLM, Air France, Delta Air Lines or Virgin Atlantic flights.

*Sigh*. You can even have a non-COVID related cancellation and get the COVID treatment from KLM. I guess time will tell if this is just a generic response or their real intentions. I have already lodged a chargeback for "refund not received" (as they had sent me a generic refund confirmation on the 10th March).