さすがに

さすがに
adverb
as expected; even (one); truly
1. as expected; as one would expect; true to one's reputation
Indicates that something lives up to expectations or reputation.
As expected, a professional is different.
Kyoto is truly beautiful, as you'd expect.
Having lived here for ten years, he knows this town well, as you'd expect.
2. even (someone/something); truly; admittedly
Indicates that even someone or something normally capable has limitations.
さすがに(つか)れた
Even I'm tired now.
Even so, that's going too far.
I haven't slept for three days, so even I've reached my limit.

さすがに has two main uses that feel opposite but share a core meaning of 'as one would expect given the circumstances.'

SENSE 1 - ADMIRING (as expected):

Praising someone or something for living up to their reputation.

SENSE 2 - LIMIT REACHED (even):

Indicating that even someone/something normally resilient has reached a limit.

RELATED FORM:
さすが (without に) is also common and largely interchangeable, though さすがに is slightly more emphatic.

POSITION:
Typically appears at the beginning of a sentence or clause.