274D          ; valid                  ;      ; NV8    # 1.1  SHADOWED WHITE CIRCLE
274E          ; valid                  ;      ; NV8    # 6.0  NEGATIVE SQUARED CROSS MARK
274F..2752    ; valid                  ;      ; NV8    # 1.1  LOWER RIGHT DROP-SHADOWED WHITE SQUARE..UPPER RIGHT SHADOWED WHITE SQUARE

border-radius($custom-select-border-radius, 0);\n  @include box-shadow($custom-select-box-shadow);\n  appearance: none;\n\n  &:focus {\n    border-color: $custom-select-focus-border-color;\n    outline: 0;\n    @if $enable-shadows {\n      @include box-shadow($custom-select-box-shadow, $custom-select-focus-box-shadow);\n    } @else {\n      // Avoid using mixin so we can pass custom focus shadow properly\n      box-shadow: $custom-select-focus-box-shadow;\n    }\n\n    &::-ms-value {\n      // For visual consistency...

   @include gradient-bg($custom-control-indicator-checked-bg);\n    @include box-shadow($custom-control-indicator-checked-box-shadow);\n  }\n\n  &:focus ~ .custom-control-label::before {\n    // the mixin is not used here to make sure there is feedback\n    @if $enable-shadows {\n      box-shadow: $input-box-shadow, $input-focus-box-shadow;\n    } @else {\n      box-shadow: $custom-control-indicator-focus-box-shadow;\n    }\n  }\n\n  &:focus:not(:checked) ~ .custom-control-label::before {\n    border-color:...

As of Kubernetes 1.19, bugfix support via patch releases for a Kubernetes minor release has increased from 9 months to 1 year.

A survey conducted in early 2019 by the working group (WG) Long Term Support (LTS) showed that a significant subset of Kubernetes end-users fail to upgrade within the previous 9-month support period.