Worked & couldn't gain traction. Capital requirements too great. Eg just a lack of funding. Limited prototypes produced but not mature enough. Tech is quietly smouldering while it is passed from company to company. Slow progress.
Worked & got absorbed. Now in some black ops lab quietly still in development with protoypes already in limited use. A limited commercial version is 5, 10 or 20 years away. The restricted version in use within 2-5 years.
Worked & still in commercial development. Fundamental issues are blocking major progress. Possible confusion over usage priorities is diluting resources, eg they are optimising for one or two use cases and those aren't particularly helping guide development, yet those use cases are also where funding is available. 10-30 years.
Don't work & too unreliable. R&D couldnt get a stable and reliable product due to fundamental issues.
Don't work & unreliable & not enough cash. The prototypes sort of worked but had issues and on top there wasn't enough capital to iron out the issues in the early prototypes.
Other options also exist. The timing started 10 years ago. Should start to see results, if any, from the "worked" options sometime this or next decade if that happened and to whatever extent. A lazy web search still shows some names. A few have quietly disappeared.
Worked & couldn't gain traction. Capital requirements too great. Eg just a lack of funding. Limited prototypes produced but not mature enough. Tech is quietly smouldering while it is passed from company to company. Slow progress.
Worked & got absorbed. Now in some black ops lab quietly still in development with protoypes already in limited use. A limited commercial version is 5, 10 or 20 years away. The restricted version in use within 2-5 years.
Worked & still in commercial development. Fundamental issues are blocking major progress. Possible confusion over usage priorities is diluting resources, eg they are optimising for one or two use cases and those aren't particularly helping guide development, yet those use cases are also where funding is available. 10-30 years.
Don't work & too unreliable. R&D couldnt get a stable and reliable product due to fundamental issues.
Don't work & unreliable & not enough cash. The prototypes sort of worked but had issues and on top there wasn't enough capital to iron out the issues in the early prototypes.
Other options also exist. The timing started 10 years ago. Should start to see results, if any, from the "worked" options sometime this or next decade if that happened and to whatever extent. A lazy web search still shows some names. A few have quietly disappeared.