During it’s initial marketing period, it gained the nickname of “plastic fantastic”. The nickname suited it quite well as it was an incredible radio at the time.
Yes, even though morse code is one of the oldest methods of radio communication, it is still very widely used and popular with operators who prefer to use as little power as possible (QRP) to maintain a contact.
Most SWR & power meters have a single sensor which means you have to start swapping cables to check different antennas.
I use a Kenwood SP-23 external speaker, while not being perfectly matched (in size) to the TS-850, but instead to the slightly smaller TS-450 & TS-570 transceivers, it still gives clear audio due to the front facing speaker, unlike the radio which has the speaker on the top panel as do most other radios.
This pair of radios are virtually identical. The newer FT-7900 has a slightly different facia, the difference being the size and shape of the control buttons.
This headset is designed and manufactured in the UK primarily for the aviation sector such as the RAF, air traffic control etc.