"If you can't be bothered to take some basic steps for web site scaling (google page speed + a CDN) then the idea that you will carefully and successfully navigate to a 1 million tests per day moderate to high complexity medical test seems like it will be a stretch no?
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Their priorities may be on other things than websites.
From experience, the clients who can't get some things right struggle to get many things right.
Seriously.
Someone has a great idea and is able to attract good people to work with them? Then even though item X is the focus, you see quality in items Y -> Z. It naturally seems to happen.
Their priorities may be on other things than websites.