You're overestimating the importance of Tailscale, underestimating the importance of SAML to enterprises and completely skipping over the fact that the customer base that Tailscale has restricted itself to, probably doesn't use SAML to begin with.
Here, I'll share you my thoughts on Tailscale:
I don't use Tailscale. I don't care about Tailscale. I don't know what Tailscale is and I don't really care to know, but I know what SAML is and I know that I will keep using SAML for the foreseeable future, and I know I won't be using Tailscale.
Pretty much every large enterprise (inc. half a dozen non-tech F500s) I've seen in the past 5 years has used either GlobalProtect or AnyConnect. Slightly further down the scale, you start to see some Prisma, Fortinet, or F5 as well. All of them support SAML, and market it as being a key feature.
Personally, I'd love to see Tailscale being deployed more widely, but I've only ever seen it deployed by tech companies.
You're overestimating the importance of Tailscale, underestimating the importance of SAML to enterprises and completely skipping over the fact that the customer base that Tailscale has restricted itself to, probably doesn't use SAML to begin with.
Here, I'll share you my thoughts on Tailscale:
I don't use Tailscale. I don't care about Tailscale. I don't know what Tailscale is and I don't really care to know, but I know what SAML is and I know that I will keep using SAML for the foreseeable future, and I know I won't be using Tailscale.
"sine qua non" is hubris.