Not to paint Spirit in a better-than-deserved light, but:
My friend had booked flights for 5 pax from NYC to Miami in August with them. About a week before flying she decided to cancel due to covid and some of the travelers high risk status. They offered her a voucher but she emailed them about getting a full refund instead, citing the Delta variant and the inability for the young kids to get vaccinated. Lo and behold they refunded her the full amount of her cancelled tickets today!