> for your modern browser I don't know which modern features might be required for that potentially breathtaking presentation, because for me it stops running

> for your modern browser I don't know which modern features might be required for that potentially breathtaking presentation, because for me it stops running at the first occurrence of optional chaining operator. According to caniuse.com, ?. has been supported for just two years, and is still only available for 92% of users. The Web is three decades old, but let's ignore that, because everything must not exist for more than a year before being replaced with Next Generation Thing. Lifespan of a butterfly is our true goal! I guess self-promotion of web developers also requires them to compete in shouting at the top of their lungs “I don't give a fuuuuuuuuuuuuuuuck about people who have to deal with websites I make”. The boldest get hired.