Perhaps the point of the story isn't whether he is saved or not since either view could be correct. Perhaps we are supposed to see that there is a real spiritual realm and it has elements of good and evil.
This should give us pause. For it is not something to be feared but is something that is subject to abuse.
Agree, I don't think the point of this passage is for us to judge the salvation of Simon.
There seems to be a theme running through it of belief via signs and miracles - all of Samaria had thought of Simon as the power of God ((v. 10)) because of the signs he did, believing him, then they are amazed also at Philip performing signs and miracles ((v. 6)), all believing him too - then John and Simon Peter arrive doing more signs and miracles, and one Simon asks another Simon for this power, willing to trade his earthly riches for it. Simon rebukes Simon, saying the power of God cannot be bought.
So there's the miracles bringing about belief and the desire for such power theme here, and there's also a bit of a 'tale of two Simons' - with the whole narrative being introduced in the context of Saul ((who would later become Paul)) persecuting the church to the point that all but the apostles had fled Jerusalem. Hence we are in Samaria, and we have a pretext of impending changes of hearts.
I think to discover the intent of these things being written we need to study out the Simeon prophecy in the NT, all the times Christ refers to Peter as Simon & the other Simons, as well as find the OT complement of this particular passage, where people are believing because of signs, and the power to perform signs is sought to be bought - or the power of God is thought to be able to be purchased - - and put all those things in the context of Saul not yet having been renewed as Paul.
So yeah, this is way bigger than 'can Simon lose salvation and/or believe in vain' IMO
The Bible is always far deeper and richer than some superficial moralism.