The inability to change
Every major character knows change is coming and cannot adapt to it. Lyubov cannot treat the orchard as a financial asset. Gayev cannot stop making useless speeches. Even Lopakhin, who does act, cannot bring himself to propose to Varya or fully enjoy what he has won. The play shows paralysis as a human condition, not just an aristocratic one.
Class and social transformation
The play sits at the moment when the Russian landowning class is losing power and the merchant class is rising. Lopakhin's purchase of the estate where his ancestors were enslaved makes that shift literal. Chekhov does not celebrate or mourn it. He shows it happening while the people involved barely understand what they are living through.
Memory and loss
The cherry orchard is beautiful and economically useless. The family keeps it alive in memory long after it stops making sense as property. Memory traps them. They cannot see the orchard as land because they see it as their past, their dead son, their childhood. That confusion between what a place is and what it means drives the whole plot.
The gap between talk and action
Trofimov gives speeches about the future. Gayev makes plans that go nowhere. Lyubov says she understands the situation but keeps sending money to Paris. The play is full of words and nearly empty of decisions. Chekhov treats this gap as both comic and devastating.
Time passing without notice
The play covers a few months, but it points to decades of decline that happened before the curtain rose. Characters are surprised by how much has changed even though the changes were slow and visible. The cherry trees are cut down offstage, at the end, quickly. Everything that led to that moment took years.