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Revealed: car industry was warned keyless vehicles vulnerable to theft a decade ago
(www.theguardian.com)
This is a most excellent place for technology news and articles.
FYI, Canada requires immobilizer by law. We can't be used to compare to other countries for that reason.
https://www.ctvnews.ca/autos/kia-and-hyundai-vehicles-in-canada-not-affected-by-u-s-theft-issue-automakers-say-1.6252590
I'm pretty sure the only companies that didn't include them as a standard feature until recently was Hyundai/Kia. Back in the 90s and 00s, Hondas were by far the number one stolen vehicle in the US and they had chipped keys.