The EU's own committee issued a research paper just a few months ago and their findings were that a technical solution is available that has already been used in other parts of the world for many years.
http://www.europarl.europa.eu/RegData/etudes/STUD/2017/596828/IPOL_STU(2017)596828_EN.pdf
That's not quite accurate. This was a report commissioned by and produced for the European Parliament's Committee on Constitutional Affairs, and you seem to have completely ignored the disclaimer on page 4 -
"The opinions expressed in this document are the sole responsibility of the author and do not necessarily represent the official position of the European Parliament.".
The recommended technical approach is based on one objective, speeding up the passage of registered traders across the border - a border with over 200 crossing points. Even if number plate scanners were used, there would still have to be new infrastructure in the form of cameras or other devices situated at border points.
The study does not address the problem of parties crossing who are not registered, whether they be smugglers, illegal immigrants or just too small to afford the 'trusted trader' certification. The study suggests such people must present themselves voluntarily to manned checkpoints, so some policing will be required for this, and presumably to perform random checks to ensure that there is no corruption or even human error - for example enforcing rules of origin, checks on the transport of dangerous materials, or animal welfare.
The problem is that the study's focus is solely on trade. More worryingly, the study only mentions the Good Friday Agreement in a single line passing reference (page 14).
I don't think it will be any surprise to you that I'm of a similar mind, though I think the real damage is going to be long term. I still believe that impending EU tax haven legislation has had more to do with Brexit than anything.
Wow, what an amazing insight you just had, I am sure the badly educated politically unaware people from oop North who voted for Brexit have a vested interest in tax havens. Why wouldn't they ? must have loads of money they would rather not pay UK tax on.
There's that straw man again.
You know the sort of people I'm talking about. Wealthy individuals who pumped millions into the 'Leave' campaigns, many of which aren't even resident in this country for tax purposes, yet use their newspaper output and their wealth to pervert democracy here.
https://www.theguardian.com/news/2017/nov/09/brexiters-put-money-offshore-tax-haven