If this concept would work in principle, covid could be reduced to scaling testing capacity. My impression is that estimates about achievable testing capacity don't assume a most-important-short-term-problem-of-mankind priority and resource allocation.

The linked article suggests a novel and much cheaper test, which would be great. But even if that didn't work out, what scale could possibly be feasible with existing tests? Pre-shortage, an RT-PCR seemed to be much cheaper than a missed day of work.

The concept for restarting the German football league involves daily testing of all players. So the idea is indeed widespread, but often enough just impractical for the numbers of tests required.

Testing a few hundred people daily would be doable, as Germany has relatively good testing capacity - probably one main reason for the overall better handling of the pandemic so far. But the concept still gets critisized, as this would mean a fast track to testing for the players while parts of the population don't have equal access to testing.

For the whole population, it would be a good first step to be test really everyone who has any assumptions of symptoms and some time later, everyone in contact. And perhaps a biweekly test for the general population.

I would expect where there's a large enough economic incentive, and wealthy-enough private group (say, the NFL, MLB, etc) who wouldn't need to wait for government policy or supply, we will see daily testing of their 'employees' so that they can get back to operating. May not be any fans in a live setting, but better than nothing.