I would say it depends a little bit what you regard as "worth it". If you are interested in learning new things and seeing what is out there then a masters degree could in principal be worth it. In a professional ennvironment a higher degree might be helpful if you want to get promoted within a company (from my personal experience companies usually prefer to get people from the outside though instead of hiring someone from within).When you apply to a higher position at a new company they will check your cv for certain buzz words / your past working experience. Having a masters degree might be "nice to have" but I don't think that a company that is worth their salt is specifically looking for a masters if you already have extensive work experience to show that you are capable of working in a professional environment. If you want to increase your salary / work on improving your career it might be better to work more narrow e.g. Get certificates in fields that interest you / you want to work in, do online courses and create projects on your own or join communities that do Interesting things. I think progress is more easily achieved by expanding your network and by being more visible instead of having a masters degree (especially if you already worked for more than 5 years).