Think about "don't use a smartphone" in 2013. That was viable back then.
It isn't anymore. What you can do is live smartphone-lite, using it only as a secondary device (as grandparent suggested). The same will be true in a couple years (if the big G is successful). Until, then, yea, don't use it, actively campaign against it.
Though, at this point I am the founder of my own company. Any software we use will not require attestation. I would be willing to switch vendors over that.
As for web attestation: the software I use regularly needs to run on OpenBSD. It's that simple.
The internet was already going increasingly-downhill anyway.
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