It's certainly possible to exceed the limits. But the Supreme Court cases that have done so recently have had connections to interstate commerce that are significantly more tenuous.
For instance it's harder to conceive of a substantial relation to interstate commerce for the Violence Against Women Act or the Gun-Free School Zones Act than it is for the regulation of health insurance.
But you don't have to get too far afield from VAWA before very recent Supreme Court precedent starts shading towards permissability under . For instance, criminalizing marijuana federally is permissable under the commerce clause.
https://en.wikipedia.org/wiki/Gonzalez_v._Raich
The interesting part there is that's a view held even by Scalia.
I don't think it's exactly difficult to conceive that regulation of health insurance is more related to interstate commerce than marijuana.
But obviously you're more interested in simply saying "liberal" and thus thinking you've won something.