VPlanner is not accurate for AIR or Nitrox dives, as it's a software for diving Trimix
Keep saying it... but it doesn't make it true.
They said (and I can readily believe) that many divers get a "panic response" the first time that they see their computer flip into deco. If you see it for the first time in a controlled environment when you know you are not actually in deco, you are likely to react better when you see it the first time "for real" the next morning.
I think this is going to become a greater reality as the emphasis on dive tuition progresses to become more computer-centric in the coming years.
Back in the days of tables, most recreational divers had no option with deco - other than to complete a statutory hang and then stay out of the water for a prescribed period. Accidental over-stays were penalized by missed dives. Going into deco was seen as a major issue, which (most) tables provided no definitive answer to or explaination of.
That is no longer true as dive computers have become the norm... and consequently, turn emergency deco from a major inconvenience into an 'easily rectifiable glitch'.
It's important that divers understand their dive computers, so that they can react appropriately to the information and guidance that it gives them. That said, it is also important to ensure that using dive computers does not create a slide in perception about the dangers of entering deco. I would predict that, in the future, divers' perception of entering deco is likely to become far less severe than it currently is.
Where divers are taught to use computers at entry-level, or beyond, it is critical that they understand all aspects of that computers operation. Emergency decompression needs to be taught with computers, just as much as it ever was with dive tables... that means some exposure to the computer's deco screen is necessary. Entering emergency deco should lose it's 'fear factor'. But....to balance this, more educational emphasis on the reasons to avoid entering deco needs to be provided.