Well, OK. But it is all situational, right? The same single regimen doesn't apply across the board, and it doesn't provide sound guidance to others to simply assert the contrary.
2L a day is fine if you are almost entirely sedentary. 4L if you go to the gym daily or run or whatever or have a physical job, or are up hiking a hill in August sun. If you are serving overseas wearing armour in a desert environment or working on forest fires it is 20L a day. Point is that there is a huge scale.
Fruits and veg all count; herbal teas as well. Tea, coffee count too, but are diuretic and therefore dehydrating.
Your pee should be clear. That's a good sign.
Thirst, however, is a tardy indicator ... by the time it presents, dizziness, bad mood, confusion etc are potentially right round the corner, if not already evident. And, you want to get ahead of that if only for comfort's sake.
Electrolyte levels are a different (if related) issue. True, if you have to drink lots, you have to keep up your salts. Cheaply: using food quality epsom salt (for magnesium), baking soda (for sodium), low sodium salt (for potassium) - 1/4 tsp each mixed in OJ for a quick electrolyte repair. But, you can get this from diet too.
Bloody anti-vaxxers
