1. Why?

Because I was home sick from work and bored.

2. Is this compatible with...?

If it's not mentioned in the description, then I don't know. You can check for compatibility yourself using SSEEdit. If you're concerned about compatibility, then use the BAT version; it's compatible with literally everything.

3. You're the author, why can't you check for compatibility? 

Because I work full time.

4. What changes did you make to Nirya?

Read the description.

5. I don't like the changes you made to Nirya, it makes her too powerful!

¯\_(ツ)_/¯

6. When will the Special Edition ESP come?

When the sun rises in the west and sets in the east. When the seas go dry and mountains blow in the wind like leaves. When your womb quickens again, and you bear a living child. Then it will arrive, and not before.

7. ...seriously?

It will come eventually. I mod primarily for and only play Classic Skyrim, so all testing of the Special Edition versions of my mods is done by my brother. And we both work full time!

8. Can I port it?

I don't know, can you?

9. May I port it?

No.

10. How do I get Nirya to follow me?

Read the description.

11. Why does this require USSEP/RDO-SE/CRF-SE?

USSEP: I work off of fixes made by USSEP. You should already have it, anyway.

RDO-SE: Relationship Dialogue Overhaul enables Nirya's voicetype to have follower dialogue.

CRF-SE: Cutting Room Floor restores the "Research Thief" quest, where you must steal some research notes from Faralda and give them to Nirya. This raises Nirya's disposition towards you, making her willing to follow you. Otherwise, you would have to go all the way through the College of Winterhold questline in order to raise her disposition enough.

12. What mods are you using in the screenshots?

All of the screenshots were taken in Skyrim Classic. In the 2018 Edition screenshots, I am using Skyrim HD (Lite version), Static Mesh Improvement Mod, Bethesda Hi-Res DLC Optimized (1K version), CBBE with Mature Skin (NSFW), Improved Eyes Skyrim, Immersive College of Winterhold, and RUSTIC CLOTHING. In the 2016 Edition screenshots, I am using Cover Eyes and Wet and Cold 2.0 with most of the aforementioned mods.

13. Looks pretty good, tracking for now.

Me, wanting to fight you but also saying the same thing myself: