Downside of routing between SVIs instead of routed interfaces?

I have worked on multiple campus LANs over the last few years that are entirely VLAN based even for routed traffic going between SVIs over a routing VLAN with the trunks passing both layer 2 and 3 traffic. I’ve never seen it recommended or even much talked about in textbooks. Do any of you work with a design like this or if you’ve moved away from it, how did you convince them that it’s better to separate the two layers fully? Are there any major disadvantages?