-No Internet Browser - Due to the Switch's versatility of being able to come off the dock and use the touchscreen, this would actually come in hand for looking up strategies on the fly during a gaming session as has been said, as long as you wouldn't have to close said game to launch the browser. The WiiU was very useful in this regard, so I do admit that it would come in handy.
-No Netflix - I do have a Netflix account, and it is tied to multiple devices, but ever since I got a Smart TV years ago, I have zero need of it on my gaming console. My TV (55" Roku TCL) has it right on the main menu, and even the remote has a Netflix launch button directly on it (and Hulu for that matter). I haven't launched Netflix on another device since. For the same reason, the YouTube app on the Switch has become completely superfluous for me.
-No Activity Log like the 3DS or even Daily Log like the Wii U - The Switch does have an Activity Log that tracks total time spent per game which is handy enough for me. I think it shows the most recent 10 (?). If you wanted to check an older title, all you would have to do is boot it up once to bring it back onto the list. That's good enough in my opinion.
-No Virtual Console - This is definitely missed, but as others have stated, Nintendo Switch Online has mostly taken its place for NES & SNES games. Capcom, Konami, Sega, SNK, etc have already sold collections of many of their back-catalogue of games themselves this gen and probably prefer to do it that way rather then spilt the profit with Nintendo. So, who knows if we will ever see something as comprehensive as the Virtual Console again.
-Achievement System - This I have zero interest in personally. I play a game to my own heart's content. I don't need someone else telling me whether I've gotten my fullest enjoyment or money's worth out of a game. I spent 225 hours beating the Legend of Zelda Breath of the Wild. I don't need an achievement system to say, "You haven't really finished the game, because you haven't found all 900 Korok Seeds yet". I always thought the Wii U handled it best. If you were particularly proud of achieving something specific in a game, you would just screenshot it and post it to Miiverse. But, that's just my opinion. I know there are people who judge whether to buy a title on XBox One or Switch based on adding to their Gamerscore. For me, it comes down to which console am I actually going to have more time to play on, and that invariably is the Switch due to its versatility. Devs can and do still use their own in-game achievement system for their individual releases on Switch anyway.
The other points are things that would be good additions for many while being take it or leave it options for me.