Glass Panels and Door Swings
A Fixed Panel Only
The simplest arrangement is a single fixed screen with an open entry beside it. Nothing to hinge, nothing to seal, nothing to fail. It works when the enclosure is long enough that the showerhead is well away from the opening, and it fails in a short enclosure where the floor outside gets wet every time.
Hinged Doors Need Room Outside
A door swinging outward needs clear space in front of it, and in a compact bathroom that space is usually occupied by a vanity or the toilet. Measure the arc on the plan rather than assuming, because a door that fouls a fitting is discovered when the glass is delivered and cannot be modified.
Sliders and the Track
A slider needs no clearance and it introduces a bottom track, which is a channel that collects water and residue and has to be cleaned. Top hung barn style systems remove the bottom track and put the load entirely on a header, which needs solid fixing and is not appropriate on every wall.
Frameless Is a Tolerance Question
Frameless glass is fixed directly to the wall with clips and hinges, so it needs the walls to be genuinely plumb and the openings square. On an older house that often means correcting the framing during the remodel. Semi frameless systems have a channel that absorbs a few millimetres of error and are the sensible answer where the structure is not perfect.
Order After Tiling, Never Before
Glass is templated against finished surfaces, because a few millimetres of tile and adhesive change every dimension. That means a gap of one to two weeks between tiling and glass installation, and it belongs in the schedule from the beginning rather than appearing as a delay at the end.