I agree with some of the basic sentiment.
THe DL103 in terms of "performance" is hopelessly outclassed by modern cartridges.
However in terms of "doing what is says on the tin", which is this case is
as a broadcast cartridge for radio, on some rather clunky equipment,
tracking at 3 to 4 grams is hard to think of anything better for the job.
It also suits certain hi-fi systems, due to its laid back frequency response.
To be strictly accurate it does not lose 8dB of highs. Tracing loss on the
inner grooves is around 3dB, you can add the cartridges response to this.
But the fact is many records are preboosted by 2 to 3 dB on the inner
grooves deliberately, a spherical tip is ideal to play these back. Also
a spherical tip is less of an issue for 45s.
Personally I'd never use one except for singles, tracking force is too high.