Protecting your knowledge, skills and ratings became the key ingredient to successfully navigate through the storms of Covid which caused Significant disruption to the airlines, pilots, and all crew. It is easy to forget the importance of your former ratings now that all is going well. This leaves pilots the difficult decision, in the good times, whether to keep old type ratings current and also on your other licence(s) if you hold more than 1 licence (ie.UK CAA/EASA). These service an insurance policy to future proof your career.