You are not going to use an ICS device as your daily driver. However, as a dedicated MP3 player for your car , a GPS navigator for hiking , a backup alarm clock , or an e-reader for the beach (no worries if it gets sandy), Android 4.0.4 remains surprisingly capable.
However, compared to modern OSes, ICS has severe limitations: android 4.0.4 apps
The key is managing your expectations. You are not looking for "apps" in the modern sense—you are looking for lightweight, legacy software that prioritizes offline utility over cloud connectivity. You are not going to use an ICS device as your daily driver