Andy So where is this trade-off
You may have simple needs that are not hindered by this level of privacy. Excellent. However, there are many websites that block access from Tor exit nodes, and many software which cannot run on Tails (or indeed any Linux platform). So for some it is much harder than for others.
Also, just because Tails might be considered the most private doesn't also mean it's the most secure. Lots of software focus heavily on one and are not so great at the other.
Andy save the planet
Here is another trade-off you haven't noticed. By choosing to "save the planet" you have decided to continue using a device past its EOL. This poses a security risk. If you say you're comfortable with that because you don't think you do anything risky, well you do you. But it's certainly still a tradeoff balance between product permanance and modern security and support.