On Wed, 29 Jan 2020 at 14:10, David Miller [off-list ref] wrote:

From: Vladimir Oltean <olteanv@gmail.com>
Date: Wed, 29 Jan 2020 13:24:30 +0200

quoted

At some point, the 5.3 kernel will go EOL. When would be a good time
to make the "flags" optional on "tc qdisc replace", without concerns
about different behavior across versions?

5.3, and 5.4, and... and how long do distros ship that kernel?

This is why it is absolutely critical to flesh out all public
facing interface concerns before the feature is merged into
the tree rather than later.

So the answer to "when would be a good time" is "never"?

-Vladimir