Tape delay... solar winds...
But seriously there have been several arguments made regarding the negative aspects of a window - most extensively by
@lawman so I’m not going to repeat it all.
For me the cons include the fact that space is dark, and ships are far the heck away from each other in space - to the point where an eyeball wouldn’t be able to see them until the enemy was right on top of you (how often did we hear “they’re 10,000 km off our bow” - that’s a long way - but the ship was massive on the screen). And if the window can magnify the image then why not keep it a screen?
Also as I’ve argued previously - if the screen is advantageous (it isn’t, but let’s assume it is) then Spock is negligent or incompetent in his role as XO of the Enterprise in TWoK for not presenting it as an option to Kirk. And I prefer to keep Spock as a competent officer rather than a bumbling fool who forgot his ship used to have a windshield