This is not the first time this topic has been discussed in this forum. The search history may help, or you can refer to the reference I list.
The major reason is that Qspice was only launched a year ago, and it is still frequently updated for bug fixes and feature improvements. This setup is intentional by Mike Engelhardt (Qspice developer) to remind users to keep updating Qspice to prevent reporting issues that have already been solved. People may want an offline version, but they may not realize that as an example since I started using Qspice in August 2023, every bug report I submit to Mike is normally fixed within one to two days. Mike works daily on Qspice unless he is out of town. In this update rate, the offline version may cause more harm than good. Imagine people reporting same bug which may already fixed only because they didn’t update the software for a software that still in active development since it launched.
By the way, Qorvo doesn’t rule out an offline version if you refer to Jeff Strang’s answer.
If you have been using Qspice from the beginning, you would have seen Qspice release this “internet” requirement throughout this year. It started from forcing uninstallation after a month of not updating, to currently allowing the suppression of auto-update detection for weeks.
Frankly, now we have the option to suppress updates for weeks, so why is it a problem if an internet connection may not be frequently available?
If you are looking for a complete offline version, maybe officially raise your concern (go to Qspice Help > About). Qspice is more stable now, but it is still actively evolving. Just don’t expect to use Qspice like LTspice/Pspice etc… which has been developed over many years, or you will be disappointed.
Mike Engelhardt : Offline installer for QSPICE - QSPICE - Qorvo Tech Forum