There are a lot of moving parts in this discussion….
I actually don’t think the productivity slowdown is a big deal. It just measures unit output per worker. We have slowing output on average that I believe is a product of mean reversion to a lower and more sustainable long-term rate of growth. So, with more workers and slowing output growth you get less unit output per worker.
If you buy my theory that growth is reverting to a more sustainable long-term mean then the slowdown in productivity is fully expected.
Then again, I’d also argue that, like GDP, productivity measurements don’t measure all the right stuff. After all, a lot of technological changes are produced for no cost (like Wikipedia), but obviously make us all much more productive. But we don’t measure all of this stuff in output so it doesn’t get tracked as being productive.
So, there’s measurement errors here and reasonable explanations for the slowdown. But no, I don’t think technology like computers are making us less productive. If anything, they make us much more productive and we are measuring that output incorrectly.