Whilst the Pi Zero has always been fine for running an ADS-B tuner it has been lacking if one wanted to run other extras on the device. Various graphs and other add ons such as VRS would cause it to struggle.
Maybe the new Raspberry Pi Zero 2 W is the answer, supposedly comparable to a Pi 3B it packs a quad core processor. My own 3B has no over heating issues so doubt the new Zero would have either.
Around half the cost of a conventional Pi too. Onboard RAM is limited to 512MB so this could cause an issue but maybe a swap file would overcome this, if indeed it is an issue.
I do have a Pi 1 with a mere 256MB of RAM that is capable of running a desktop with virtual-VNC. Only loaded to facilitate setting up something for which a Desktop made the task simple. The Desktop Manager and VNC Server are not running on startup and are started using systemctl if and when required.