Real neon signs are now very little used, most so called neon signs are copies involving LEDs.
The making and repairing of real neon signs is a dying trade, regrettably.
The once famous advertising signs at Piccadilly circus in London used to consist largely of real neon, but is now faked by means of large flat panel displays. IMHO, the authorities should have insisted on real neon being retained at such a high profile site.
I did a small job for a couple in Norfolk about 18 months ago, and the husband made real neon signs in his garage. He bent the glass tubes into shape by heating the glass, and introduced the electrodes as well. It was fascinating to see. It is a rare art though.