It's always so fascinating to read about EVTOL outside of industry forums, especially where commenters are highly inquisitive (both in the physics/engineering

It's always so fascinating to read about EVTOL outside of industry forums, especially where commenters are highly inquisitive (both in the physics/engineering of these vehicles and in their proposed business models.) For those who've read into Lilium and their business model, some comments: 1. There are lots of very talented people at the company, including several friends of mine. They also have strong leadership and a very well connected board. However, their design has several unproven aspects to it. 2. The biggest issue Lilium has is their battery, which is predicated on technology that doesn't exist yet. Battery technology doesn't improve like the semiconductor. There is no Moore's Law. What Lilium needs is an Einstein-level breakthrough in chemistry. Who knows if and when that will happen? 3. Lilium, like several other EVTOL manufacturers, managed to SPAC itself last year. Many of its investors are now retail investors who do not understand aerospace platform development, the challenges and risks of this nascent EVTOL domain, nor the necessary timelines for development, certification, or infrastructure development (a much bigger challenge IMHO than certification.) As a result, thanks in part to the reveal about above issue #2 some months ago (which may or may not be related to a major drop in stock price,) there is now a class-action investor lawsuit against the company. Uh oh! Btw, I do a lot of work in aerospace safety standards around emerging tech, and therefore have a lot of tentacles into this new domain of aerospace, although I do not work commercially in AAM/EVTOL/UAM. As an engineer and leader, I think broadly and connect dots. This is uncommon in the industry, which is highly siloed. In short, there is a good deal skepticism in these comments. I think that's warranted, and I tend to agree with that skepticism. Lilium and others will have a positive and positively transformative effect on aviation--especially in the general and business aviation space (what we aerospace nerds call Part 23, even though EVTOL is now Part 21.17b--another issue to read up about!) However, I wouldn't bet a dime on the current business models of most of these EVTOL/UAM OEMS.