Freelances/Contractors: Different Version of SW than Client?

For anyone who has done freelance/contract work, how does one get around the client having a different version of SW than contractor?  I am going to start trying to take some side jobs, but if I have SW 2020 and a client does not, that will pose a problem.  And I know from experience that most companies aren't as up to date on their licenses as they should be.

Any thoughts?  Thanks.

SolidworksGeneral