I think the fact that the getup is a single sequence with a lot of benefits is the basis for its appeal. However, there is a lot to be gained from variety, and specialized variety. Just remember, "The goal is to make sure the goal remains the goal." -- not sure who but someone very smartGuys - don't take this the wrong way. I have done my share of TGUs. And I think it is a very useful exercise that can teach us a lot.
However.
Let's say I am outside and there is no place to lay down. Or - let's say my elbow hurts when I push the floor. Or - let's say there is no room to lay down.
Please, don't feed me the "you need to get your form checked" and "find a better place" stuff. Think with me.
How can we get the similar benefits?
Let's say we make the program press focused. Great.
Then - maybe adding loaded carries and windmills?
Or - maybe just loaded carries and heavier goblet squats for the core strength?
I am not denying the TGU - that is a great movement. But - what if there is no option to load it? What can give us similar benefits?
In any event, you could try any or all of the following: arm bar, bent arm bar, half kneeling bent arm bar, windmill, half kneeling wind mill, bent press, and its variations.
Some of these require a space to lie down. Others just to kneel. Others are done standing. Hopefully this gives you some solutions for the scenarios you described.