upd readme

Author: aplavin

README.md

@@ -1,7 +1,7 @@
 # AxisKeysExtra.jl
 
 The [AxisKeys.jl](https://github.com/mcabbott/AxisKeys.jl) package provides a nice lightweight `KeyedArray` structure: arrays with keyed/labelled axes, similar to `xarray` in Python. \
-It is being maintained, but proposed new features – even simple and self-contained ones – aren't being added ([see, e.g.](https://github.com/mcabbott/AxisKeys.jl/pull/110)). That's the reason for this package, `AxisKeysExtra.jl`: it extends `AxisKeys` with new convenience functions, conversions, Makie plotting recipes.
+It is being maintained, but for stability reasons new features are added very cautiously. That's the reason for this package, `AxisKeysExtra.jl`: it extends `AxisKeys` with new convenience functions, conversions, Makie plotting recipes. Some of them may be upstreamed to `AxisKeys` at some point.
 
 The intended usage is to just do `using AxisKeysExtra`: it reexports `AxisKeys`, so one can use both regular `AxisKeys` functionality and functions defined in this package.\
 See [the Pluto notebook](https://aplavin.github.io/AxisKeysExtra.jl/test/notebook.html) for details and examples.