Aside from a house I intend to live in, I'm 100% stocks & commercial RE, including leverage on the stocks (portfolio value approx $2.5M, debt approx $1M). Its worked out well for me, I'm age 33, have a $1.55M net worth and now 3% SWR - below the current dividend yield of my portfolio. I've had an above average, but not astronomic income.
Leverage does amazing thing when you get lucky on the timing (leverage into the last ~7 years stock bull market, leverage into housing during sub-prime crash), but horrible things when you are unlucky (margin pre GFC and leveraged real estate during the RE crash).
Most people talking about it will have some recency bias. I love my margin loans! Why? Because I've held them through a very lucky part of the cycle. Its the same with RE loans - recent memory for these is very successful.
Yes, leverage can help you reach goals faster, but it can also lead to a bust outcome. If I were doing it over again, or recommending to others, I'd suggest having a lower degree of leverage than I did - its got a much more stable range of outcomes, at the cost of not all that much time.
In terms of stocks or RE, people have had success with both. People also tend to group together in their own kool-aid quaffing groups, cheering on what they know and believe in. Easiest example? Post your original post in the RE part of this forum, and you will get a response of "Why would you bother with anything except RE? I can be an expert in my asset and get outsize returns". Post it here in investor alley, and you will get "RE? That's way too much work. Why would I take on all the concentration risk in choosing an individual asset I think will outperform? I don't try to pick individual stocks, which are highly diversified companies, so why would I think I can pick an outperforming individual house? Why would you bother with anything except stocks?".
Like most debates, there are strengths on both arguments, and both can achieve an early FI outcome. However, individuals, and their psychology may be better suited to one or the other. The optimum allocation is probably a bit of both over the full cycle.