Your mental health, ability to work, and happiness are all impacted pretty heavily by your diet. Lacking some nutrients can increase depression, lacking others can result in always feeling tired and sluggish, etc.
The reason I'm wary of soylent is not because I doubt that I could live on it (many people have lived for fairly significant durations on basically only soylent), but because I worry it would overall decrease my quality of life. Saving time eating is great, but it's not worth feeling like shit the rest of the time.
I'm not looking for a "food replacement" though. I just want something that I can eat for lunch because I often forget to eat anything at all (also with breakfast, but that's more of not wanting to waste the time on making a good breakfast).
Soylent seems like a great choice vs nothing half of the time. It's also better than me just eating rasin bran for the 20th morning in a row.
It takes about 5 minutes to grill an egg or boil one. If you soak oatmeal overnight, it takes about 10 minutes to fully cook. You can make toast or hashbrowns in about that amount of time as well.
My routine is often start heating some food, then go brush my teeth while it's heating, so no time wasted.
Small condiments can add a lot of variety -- buy a tub of yogurt, cream, cheese, salmon slices, sausage, etc., then just mix and match. You won't have to have the same meal twice in a week.
And if cooking is simply too much of a hassle, why not just buy some apples, oranges, or whatever fruit suits your fancy, and just eat it whole? Pretty sure everyone agrees that fruit is healthy, and they're cheap.
The problem is that many "healthy" things either cost time to prepare and make, or they cost money to buy.
I don't want to spend either of those, and based on my past experience, I'll just end up not eating, or just drinking milk if the barrier is too high. I know it's not healthy, but its what ends up happening.
(I have tried Soylent, and I think it's foul and unsatisfying. Tech bros apparently can't make Ensure or Slim-Fast better than Ensure or Slim-Fast is. Which isn't very good.)
I hope Soylent works out for you, I'm just really doubtful that it's a reliable long term solution. It's our hubris in thinking we understood nutrition that led to stuff like trans fats being added to everything. Hope this isn't just repeating the same mistake.