Various Browser clients have provided approximate deadlines for disabling TLS 1.0 and TLS 1.1 protocol:

The most common failing with insecure websites is that they run the two old Protocols TLS 1.0 and TLS 1.1

Various Browser clients have provided approximate deadlines for disabling TLS 1.0 and TLS 1.1 protocol:

Best practices outlined in RFC-7525 give reasons why it is discouraged to use protocol TLS 1.0 and TLS 1.1. PCI-DSS recommends users to switch from protocol TLS 1.0 and adopt protocol TLS 1.2+.

To comply with best practice and still be able to work with the majority of current devices you should be running TLS 1.2 (for older devices) and TLS 1.3 (for current devices).

Some customers worry, understandably about backwards compatibility. However the number of visits from browser devices running only TLS 1.0 and TLS 1.1 is now generally under 1.2% on many websites. Importantly the Javascript functionality on these older devices makes them inoperable with most current websites. These use technologies like AJAX and JQuery especially on menus, baskets and checkouts.

In our experience, when we are asked for data assessments on supporting old browsers like for example Windows 7 and Internet Explorer 10 we find that visits are extremely low and that few if ever convert to a sale.