Whilst it is true that the Purcy might not be backwards compatible, I can't see how those with MRT transponders can complain. MRT copied the AMB system of signalling, and don't own or lead the design of the system.
Like any 'copied' design it gets superseded. Trying to eliminate the competition is something the market does all the time, so if you buy a 'copy' that's the risk you take. You can hardly blame AMB for trying to put a competitor at a disadvantage!
MRT users bought a copy; this is what is likely to happen; suck it up!
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