VR exercise is a remarkably poor allocation of time (if your interest is physical fitness, efficiently). It also leaves out the most important adaptation of all: strength.
Effective training (not exercising) requires a progression model. That is, on some time frame you must exceed your performance at the end of that time frame when compared to the beginning of the time frame. This must be done in some measurable way--trying "harder" is ineffective. For example, if you squatted 120 kg x 5 two days ago, today you need to squat 122.5 kg x 5. VR cannot support such a progression model because it is incapable of producing a sufficiently intense stimulus (obviously for strength, but also for cardiovascular fitness) to result in continued adaptations; i.e., you cannot effectively scale the stress to produce meaningful adaptations after an initial period of adaptations. I'm sure if the author of the post continues for another 80 days, you'll see progress mostly stall.
At any rate, the bigger issue is that the most important component of fitness--strength--is left out entirely. Strength is extremely correlated with decreased morbidity/mortality but, perhaps more tangibly, becoming strong results in vast, systemic changes to your body and (especially if you're older or extremely unfit already) similarly vast improvements to your quality of life. You are a physical entity and the way you interact with your environment is expressed through forces; the degree to which you can produce such forces is strength. We all depend on strength.
As anyone who is strong will tell you, being strong is a far superior state to being weak. If you only "exercise" or just go for runs or only do VR exercise, you are weak.
(Effective) strength training trains your entire body. Your bones, your nervous system, your balance, and yes, even cardiovascular fitness. You can become very strong lifting just 3x a week for one hour each time. Throw in some HIIT (which takes 15 minutes and results in better cardiovascular fitness than VR exercise because it has a progression model and is sufficiently intense to result in sufficient stress to evoke an adaptation) on a rest day and you have a far, far more effective recipe for general fitness with significantly less time spent. All other factors being equal, the man who can squat 400 lbs will always be fitter than the man who plays VR for 45 minutes every day--and the former can do it with a smaller time investment.
For any naysayers arguing that strength training isn't fun (like VR is): it is fun. You're playing Pokemon, just leveling up IRL instead of your Clefairy. The progression model I explained above makes it fun.