The thread title is: "Is radar like the extinct typewriter".
Rather than the implied question I will answer the plain text question.
No radar is not like the extinct typewriter. The typewriter was supplanted by computer and print because it did most of the jobs a typewriter did only better. It was easier to edit the final product, it was easier to fill in boilerplate, it was easier to create multiple versions of the same document, multiple fonts and sizes can be used in a single
document, tables and graphs can be inserted.
The advantages of typewriters included lower cost to purchase
and maintain and the ability to operate without a power supply.
One of the typewriters last adantages to be lost
was filling in forms. This was only lost once internet
access had approached saturation. Until then people without Internet
had to be able to neatly fill in forms they'd picked up, such as government
forms and job applications. The last typewriter factory closed 5yr ago. There was still a market but not big enough to support a production line.
Typewriters did one thing, put letters an a page and computer/printers did that, with more sizes and fonts plus they do other things like tables and graphics.
Radar does a number things: detects weather
, detects land formations, detects other vessels, detects bouys and other objects all in the actual relative locations and announces your position to others operating radar in the same band.
The best weather forecast
can't warn you that a squal will hit in 3min. It can't show you the way around the squal that is 10-15min away.
AIS can't show you a vessel that isn't transmitting.
GPS and a chart plotter can't tell you here you actually are relative to a landmark that was incorrectly mapped. It can show you misleading info about about that dragged its anchor
and now is in the channel rather than next to it.
Other instrument now do some of the functions only radar could and do them better, indicate time and PCA for a passing vessel.
Nothing will replace some of the functions of radar so it is likely radar will be around a long time.
That said it may not be something you want or particularly need.