Can an opponent use reactions (like Gust) during your turn if you only played units with no triggers and are passing turn?

Ruling: No, the opponent cannot use reactions during your turn if you only played units and passed turn without any triggers occurring. Reactions can only be played when a player has priority, which requires either a chain/stack of abilities or a showdown.

Sequence:

• You play units during your turn
• If those units have no "when I'm played" triggers, no stack is created
• You pass turn with no end-of-turn triggers
• No priority window exists for the opponent to react
• Turn passes to opponent

Nuances:

• Reactions can be played "at any time" on a player's own turn, but "any time" is defined as "when you have priority"
• Priority requires either triggered abilities going on the stack or a showdown
• Phase changes, placing units, moving, and adds cannot be reacted to unless accompanied by a triggered ability or showdown
• If units like Annie or Sona with end-of-turn triggers were played, that would create a priority window