> I still have significant traffic at some clients from IE9

It's been 15 years since IE9. Where do you draw the line?

Depends on the revenue they bring vs the cost of serving them. It's highly dependent on market/business/company.

Often you simply don't offer the feature. E.g 3d rendered previews may not be available but product configuration and cart keeps working on a shop selling custom showers (you fallback to dynamic static images).

In real estate a page displaying fancy maps with price statistics by area/neighborhood might be unavailable, but the core business of listings and search does.

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egorfine 3 hours ago | parent [-]

> Depends on the revenue they bring

Fifteen years! Unless it's a government agency what's the point even in doing business with a company that uses 15 y.o. browser? They will pay you in silver coins according to 2011 prices.

	▲	epolanski 2 hours ago \| parent [-]
		The people that work there are the customer, not the company itself. And they mostly check your website when they are bored at work. Not when they leave it and have kids, hobbies or a household to care for. In travel sector users predominantly navigate in office hours from their work devices. You go meet them where they are. 4% of 6 million daily users is 240'000 potential customers. Converting 3% of them means millions at the end of the year. Maybe some like airbnb have (or at least used to have) a unique catalogue and they can play a different game and afford to lose some money. Most e-commerces play differently, at different scales and enjoy different moats and different shareholders/owners expectations.