I'm used to using Modifier as the last parameter in a composable call. I know that most people don't use it this way - including the Compose sources.

Row(
    modifier = modifier
        .background(backgroundColor, shape = shape)
        .padding(
            vertical = 4.dp,
            horizontal = 8.dp,
        ),
    verticalAlignment = Alignment.CenterVertically,
)

vs

Row(
    verticalAlignment = Alignment.CenterVertically,
    modifier = modifier
        .background(backgroundColor, shape = shape)
        .padding(
            vertical = 4.dp,
            horizontal = 8.dp,
        )
)

The main reason for me is that as the last parameter I don't need to use a comma. This way I can reorder modifier lines, copy/paste them without thinking about the comma, the diff in git look cleaner, and so does the code itself - when the last parameter line is indented compared to the beginning of other parameters, it catches my eye - but it's just a habit, for sure So those are my reasons for using it as the last parameter, if you use it as the first - what are your reasons? Are there any advantages?

I also prefer Modifier as the last parameter on the call site, because as for me all other parameters are component specific and thus more important than the modifier itself.

It’s so annoying that after enabling trailing commas everywhere, it’s a better experience except for this one case, and every time I have to reorder modifiers I clench my fist against the clouds being annoyed 😅 With that said, I also always use Modifier as the last parameter on the call site, exactly for the reasons that Oleksandr explains too. It’s a pretty nice habit to get into.