True and an important point that some ignore - but it also removed security infrastructure at the border. Its genius was getting people to accept the status quo unless and until a majority want it to change by, among other things, making the border invisible in everyday life https://twitter.com/TomMcTague/status/1306477957398003713

And this was made possible by the fact that both the UK and Ireland were members of the EU's customs union and single market. At the time, no-one envisaged that was going to change - and it hardly featured as an issue (at least in Great Britain) during the Brexit referendum

But it has dominated the Brexit debate ever since. The hard truth so many continue to avoid is Brexit has to mean a) the UK staying aligned with certain EU rules or b) some checks when goods move from GB to NI or c) some checks when goods move between NI and Ireland