Gridlock: A Surprisingly Gridlocked Sudoku Despite the Empty Grid!

Today's Puzzle:

First feature of the disjoint rule set on this channel, and what a puzzle to showcase how powerful they can be!

It may look deceiving, but the grid is full of constraints.

Link to Play Along:

Gridlock by ark29 https://tinyurl.com/SudokuSleuthGridlock

Rules:

Standard Sudoku rules apply (Place the digits 1-9 in every row, column, and 3x3 box)

Standard little killer rules apply (Numbers outside the grid give you the sum of all digits in the indicated diagonal)

Standard killer cage rules apply (Numbers inside the cage sum to the number in the top left corner)

Thermo rules apply (Numbers strictly increase from the bulb to the tip)

Standard disjoint rules apply (Cells that appear in the same relative position in their 3x3 box must not contain the same number)