There are a couple of browser extensions to enhance diaspora, also if you’re interested there’s a small hack to change the view to two or three columns.

/* ===== TALLER NOTIFICATIONS DROPDOWN ===== Doc Edward Morbius */ 
.navbar.navbar-fixed-top .nav-badges .dropdown-menu .notifications { 
    max-height: calc(85vh - 4em); 
    min-height: 8em; 
} 

/* ===== EXPAND ALL POSTS ===== Gible Fog */ 
.expander { 
    display: none; 
} 
.stream-element .collapsible, 
.stream-element .collapsible.collapsed { 
    max-height: 1000px; 
    overflow-y: auto!important; 
    height: unset!important; 
} 

/* ===== TRIPLE COLUMN STREAM ===== Filip H.F. "FiXato" Slagter */ 
/* For two columns, change 33% to 50% */ 
/* To adjust sidebar size, alter 15%-85% split */ 
/* To remove sidebar, use "display:none" instead of width:0% */ 
/\* #main-stream .stream-element { 
    float: left; 
    width: calc(33% - 20px); 
    margin-right: 20px; 
} \*/ 

#main-stream > div { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(33%, 1fr)); 
  grid-gap: 0.5em; 
} 

body > .container-fluid > .row > .col-md-3 { 
    width: 15%; 
} 
body > .container-fluid > .row > .col-md-9 { 
    width: 85%; 
} 
.container-fluid { 
    max-width: none; 
} 

/* ===== DOUBLE COLUMN COMMENTS ===== Isaac Ji Kuo */ 
/* To adjust post width, alter 40%-60% split */ 
/* For three columns, change 50% to 33% and column-count to 3 */ 
/\* #single-post-content.col-md-6.single-post-content { 
    width: 40%; 
} 
#single-post-interactions.col-md-6.single-post-interactions { 
    width: 60%; 
    column-count: 2; 
    column-width: calc(50% - 5px); 
    column-gap: 5px; 
} 
.comment.media { 
    break-inside: avoid; 
} \*/