In case you're unaware, it's been a long time since the typical suburban home is limited to having just pulley-style clotheslines that run across your yard, clotheslines nowadays come in a variety of form factors:
Each category is designed to cater to specific 'requirements', these requirements include (but are not limited to) the location and demands of the user, the way they are engineered is also largely dictated by the style of the home and climate of the region where they will be used.
Installation is also a big factor in play here since some models require very little or now need for professional installation service at all, this way, the clothesline manufacturers can cater to a larger market which is win-win situation considering all the positive aspects of drying clothes in an eco-friendly manner.
Different Types For Different Situations
Fold-downs and retractables can be purchased in various sizes and capacities, most important of all, some manufacturers even allow full customisation of your clothesline. Both units let you do high density drying sessions which means you get to dry tons of articles even in small spaces like balconies and walkways.
Rotary Hoists offer the highest capacity relative to its footprint, yes they do consume a bit more than folding clotheslines but given that the top assembly rotates and can be lifted to catch some breeze make them better performers and makes for a convenient way to hang clothes.
Portable and ceiling mounted airers are the best in terms of space-saving techniques, the former can be used wherever you choose to do so and the latter occupies an often under-utilized space in the house--the overhead clearance/ceiling. Great for small utility rooms with continuous airflow, they let you dry clothes without consuming usable floor area.