I don't understand why you're downvoted. It's an important observation.
In my case, my employer was bought and sold 3 times. All three cases involved a sudden and abrupt termination of my insurance.
It was "okay" when I was single, but once I carried my wife, and then my entire family, it became a huge problem.
Throughout my tenure at my job, I had major surgery and two children. Sudden insurance changes immediately before or during any of those events would be a huge problem. (Fortunately, the timing worked out.)
Europe also has a broader fix for this, called Transfer of Undertakings rules, the UK version is "TUPE" the "Transfer of Undertakings (Protection of Employment) Regulations".
The broad overview of TUPE is that employees whose actual job doesn't change shouldn't have to put up with any negative consequences at all for the fact that at some higher level their employer changed. e.g. the office building switches from Ace Cleaning Corp. to Best Cleaning Limited, but it's still Jenny and Achmed actually doing the cleaning, just in blue overalls instead of yellow now. It makes no sense to be allowed to tell Jenny now she's only getting minimum wage because Best Cleaning Limited doesn't pay as much as Ace Cleaning Corp, she's doing the same job so she should continue to get the same pay.
But I don't mean just obvious stuff like they can't cut your pay, it's everything - your seniority is preserved, shift priorities, rules for how much paid leave you get, or how pensions are paid - if it was part of the job, then it moves with the job. If employment-based health insurance was a big thing here, that would undoubtedly be covered.
In my case, my employer was bought and sold 3 times. All three cases involved a sudden and abrupt termination of my insurance.
It was "okay" when I was single, but once I carried my wife, and then my entire family, it became a huge problem.
Throughout my tenure at my job, I had major surgery and two children. Sudden insurance changes immediately before or during any of those events would be a huge problem. (Fortunately, the timing worked out.)