> access multiple services at once with a single token If you're talking about multiple microservices under your own control, then they could all work with you

> access multiple services at once with a single token If you're talking about multiple microservices under your own control, then they could all work with your distributed session store just as easily (if not more so). If you're talking about SSO across multiple third-party services, then perhaps JWT could be a nicer solution than SAML. However, here you're talking about a single-digit percentage of edge cases. Not enough to declare "JWT over sessions" as a general rule.