Yeah, I‘d agree that performance is the crux of the issue for many PETs.
I am not terribly confident that over the next 5 years we will see anything like a 10x or 100x improvement in general fully homomorphic encryption.
Instead, I think we already have some domains for which FHE is really practical today (like private information retrieval), and we should focus on those. In these domains, the cost overhead of PIR is less than ~10-100x, and negligible for many real-world scenarios.
I am not terribly confident that over the next 5 years we will see anything like a 10x or 100x improvement in general fully homomorphic encryption.
Instead, I think we already have some domains for which FHE is really practical today (like private information retrieval), and we should focus on those. In these domains, the cost overhead of PIR is less than ~10-100x, and negligible for many real-world scenarios.